diff --git a/CHANGES.txt b/CHANGES.txt
index 29391a11..17789c07 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,5 +1,9 @@
 2.2.0 (March 28, 2025)
  - Added new optional argument to the client `getTreatment` methods to allow passing additional evaluation options, such as a map of properties to append to the generated impression object sent to Split backend.
+ - Added two new configuration options for the SDK storage in browsers when using storage type `LOCALSTORAGE`:
+    - `storage.expirationDays` to specify the validity period of the rollout cache.
+    - `storage.clearOnInit` to clear the rollout cache on SDK initialization.
+ - Updated SDK_READY_FROM_CACHE event when using the `LOCALSTORAGE` storage type to be emitted alongside the SDK_READY event if it has not already been emitted.
 
 2.1.0 (January 17, 2025)
  - Added support for the new impressions tracking toggle available on feature flags, both respecting the setting and including the new field being returned on `SplitView` type objects. Read more in our docs.
diff --git a/src/readiness/__tests__/readinessManager.spec.ts b/src/readiness/__tests__/readinessManager.spec.ts
index 9e2cf34a..174f1373 100644
--- a/src/readiness/__tests__/readinessManager.spec.ts
+++ b/src/readiness/__tests__/readinessManager.spec.ts
@@ -3,10 +3,14 @@ import { EventEmitter } from '../../utils/MinEvents';
 import { IReadinessManager } from '../types';
 import { SDK_READY, SDK_UPDATE, SDK_SPLITS_ARRIVED, SDK_SEGMENTS_ARRIVED, SDK_READY_FROM_CACHE, SDK_SPLITS_CACHE_LOADED, SDK_READY_TIMED_OUT } from '../constants';
 import { ISettings } from '../../types';
+import { STORAGE_LOCALSTORAGE } from '../../utils/constants';
 
 const settings = {
   startup: {
     readyTimeout: 0,
+  },
+  storage: {
+    type: STORAGE_LOCALSTORAGE
   }
 } as unknown as ISettings;
 
@@ -67,7 +71,14 @@ test('READINESS MANAGER / Ready event should be fired once', () => {
   const readinessManager = readinessManagerFactory(EventEmitter, settings);
   let counter = 0;
 
+  readinessManager.gate.on(SDK_READY_FROM_CACHE, () => {
+    expect(readinessManager.isReadyFromCache()).toBe(true);
+    expect(readinessManager.isReady()).toBe(true);
+    counter++;
+  });
+
   readinessManager.gate.on(SDK_READY, () => {
+    expect(readinessManager.isReadyFromCache()).toBe(true);
     expect(readinessManager.isReady()).toBe(true);
     counter++;
   });
@@ -79,7 +90,7 @@ test('READINESS MANAGER / Ready event should be fired once', () => {
   readinessManager.splits.emit(SDK_SPLITS_ARRIVED);
   readinessManager.segments.emit(SDK_SEGMENTS_ARRIVED);
 
-  expect(counter).toBe(1); // should be called once
+  expect(counter).toBe(2); // should be called once
 });
 
 test('READINESS MANAGER / Ready from cache event should be fired once', (done) => {
@@ -88,6 +99,7 @@ test('READINESS MANAGER / Ready from cache event should be fired once', (done) =
 
   readinessManager.gate.on(SDK_READY_FROM_CACHE, () => {
     expect(readinessManager.isReadyFromCache()).toBe(true);
+    expect(readinessManager.isReady()).toBe(false);
     counter++;
   });
 
diff --git a/src/readiness/readinessManager.ts b/src/readiness/readinessManager.ts
index 6f46474d..c69eedce 100644
--- a/src/readiness/readinessManager.ts
+++ b/src/readiness/readinessManager.ts
@@ -3,6 +3,7 @@ import { ISettings } from '../types';
 import SplitIO from '../../types/splitio';
 import { SDK_SPLITS_ARRIVED, SDK_SPLITS_CACHE_LOADED, SDK_SEGMENTS_ARRIVED, SDK_READY_TIMED_OUT, SDK_READY_FROM_CACHE, SDK_UPDATE, SDK_READY } from './constants';
 import { IReadinessEventEmitter, IReadinessManager, ISegmentsEventEmitter, ISplitsEventEmitter } from './types';
+import { STORAGE_LOCALSTORAGE } from '../utils/constants';
 
 function splitsEventEmitterFactory(EventEmitter: new () => SplitIO.IEventEmitter): ISplitsEventEmitter {
   const splitsEventEmitter = objectAssign(new EventEmitter(), {
@@ -114,6 +115,10 @@ export function readinessManagerFactory(
         isReady = true;
         try {
           syncLastUpdate();
+          if (!isReadyFromCache && settings.storage?.type === STORAGE_LOCALSTORAGE) {
+            isReadyFromCache = true;
+            gate.emit(SDK_READY_FROM_CACHE);
+          }
           gate.emit(SDK_READY);
         } catch (e) {
           // throws user callback exceptions in next tick
diff --git a/src/storages/AbstractSplitsCacheAsync.ts b/src/storages/AbstractSplitsCacheAsync.ts
index a43a57f2..420b9202 100644
--- a/src/storages/AbstractSplitsCacheAsync.ts
+++ b/src/storages/AbstractSplitsCacheAsync.ts
@@ -37,14 +37,6 @@ export abstract class AbstractSplitsCacheAsync implements ISplitsCacheAsync {
     return Promise.resolve(true);
   }
 
-  /**
-   * Check if the splits information is already stored in cache.
-   * Noop, just keeping the interface. This is used by client-side implementations only.
-   */
-  checkCache(): Promise<boolean> {
-    return Promise.resolve(false);
-  }
-
   /**
    * Kill `name` split and set `defaultTreatment` and `changeNumber`.
    * Used for SPLIT_KILL push notifications.
diff --git a/src/storages/AbstractSplitsCacheSync.ts b/src/storages/AbstractSplitsCacheSync.ts
index 512d990e..483deb42 100644
--- a/src/storages/AbstractSplitsCacheSync.ts
+++ b/src/storages/AbstractSplitsCacheSync.ts
@@ -43,14 +43,6 @@ export abstract class AbstractSplitsCacheSync implements ISplitsCacheSync {
 
   abstract clear(): void
 
-  /**
-   * Check if the splits information is already stored in cache. This data can be preloaded.
-   * It is used as condition to emit SDK_SPLITS_CACHE_LOADED, and then SDK_READY_FROM_CACHE.
-   */
-  checkCache(): boolean {
-    return false;
-  }
-
   /**
    * Kill `name` split and set `defaultTreatment` and `changeNumber`.
    * Used for SPLIT_KILL push notifications.
diff --git a/src/storages/KeyBuilderCS.ts b/src/storages/KeyBuilderCS.ts
index 23961f89..d3404ed1 100644
--- a/src/storages/KeyBuilderCS.ts
+++ b/src/storages/KeyBuilderCS.ts
@@ -50,6 +50,10 @@ export class KeyBuilderCS extends KeyBuilder implements MySegmentsKeyBuilder {
   buildSplitsWithSegmentCountKey() {
     return `${this.prefix}.splits.usingSegments`;
   }
+
+  buildLastClear() {
+    return `${this.prefix}.lastClear`;
+  }
 }
 
 export function myLargeSegmentsKeyBuilder(prefix: string, matchingKey: string): MySegmentsKeyBuilder {
diff --git a/src/storages/dataLoader.ts b/src/storages/dataLoader.ts
index 2ab542a9..49522bce 100644
--- a/src/storages/dataLoader.ts
+++ b/src/storages/dataLoader.ts
@@ -1,7 +1,9 @@
 import { PreloadedData } from '../types';
-import { DEFAULT_CACHE_EXPIRATION_IN_MILLIS } from '../utils/constants/browser';
 import { DataLoader, ISegmentsCacheSync, ISplitsCacheSync } from './types';
 
+// This value might be eventually set via a config parameter
+const DEFAULT_CACHE_EXPIRATION_IN_MILLIS = 864000000; // 10 days
+
 /**
  * Factory of client-side storage loader
  *
diff --git a/src/storages/inLocalStorage/SplitsCacheInLocal.ts b/src/storages/inLocalStorage/SplitsCacheInLocal.ts
index 61988139..82be56cd 100644
--- a/src/storages/inLocalStorage/SplitsCacheInLocal.ts
+++ b/src/storages/inLocalStorage/SplitsCacheInLocal.ts
@@ -5,7 +5,6 @@ import { KeyBuilderCS } from '../KeyBuilderCS';
 import { ILogger } from '../../logger/types';
 import { LOG_PREFIX } from './constants';
 import { ISettings } from '../../types';
-import { getStorageHash } from '../KeyBuilder';
 import { setToArray } from '../../utils/lang/sets';
 
 /**
@@ -15,21 +14,14 @@ export class SplitsCacheInLocal extends AbstractSplitsCacheSync {
 
   private readonly keys: KeyBuilderCS;
   private readonly log: ILogger;
-  private readonly storageHash: string;
   private readonly flagSetsFilter: string[];
   private hasSync?: boolean;
-  private updateNewFilter?: boolean;
 
-  constructor(settings: ISettings, keys: KeyBuilderCS, expirationTimestamp?: number) {
+  constructor(settings: ISettings, keys: KeyBuilderCS) {
     super();
     this.keys = keys;
     this.log = settings.log;
-    this.storageHash = getStorageHash(settings);
     this.flagSetsFilter = settings.sync.__splitFiltersValidation.groupedFilters.bySet;
-
-    this._checkExpiration(expirationTimestamp);
-
-    this._checkFilterQuery();
   }
 
   private _decrementCount(key: string) {
@@ -79,8 +71,6 @@ export class SplitsCacheInLocal extends AbstractSplitsCacheSync {
    * We cannot simply call `localStorage.clear()` since that implies removing user items from the storage.
    */
   clear() {
-    this.log.info(LOG_PREFIX + 'Flushing Splits data from localStorage');
-
     // collect item keys
     const len = localStorage.length;
     const accum = [];
@@ -141,19 +131,6 @@ export class SplitsCacheInLocal extends AbstractSplitsCacheSync {
   }
 
   setChangeNumber(changeNumber: number): boolean {
-
-    // when using a new split query, we must update it at the store
-    if (this.updateNewFilter) {
-      this.log.info(LOG_PREFIX + 'SDK key, flags filter criteria or flags spec version was modified. Updating cache');
-      const storageHashKey = this.keys.buildHashKey();
-      try {
-        localStorage.setItem(storageHashKey, this.storageHash);
-      } catch (e) {
-        this.log.error(LOG_PREFIX + e);
-      }
-      this.updateNewFilter = false;
-    }
-
     try {
       localStorage.setItem(this.keys.buildSplitsTillKey(), changeNumber + '');
       // update "last updated" timestamp with current time
@@ -215,48 +192,6 @@ export class SplitsCacheInLocal extends AbstractSplitsCacheSync {
     }
   }
 
-  /**
-   * Check if the splits information is already stored in browser LocalStorage.
-   * In this function we could add more code to check if the data is valid.
-   * @override
-   */
-  checkCache(): boolean {
-    return this.getChangeNumber() > -1;
-  }
-
-  /**
-   * Clean Splits cache if its `lastUpdated` timestamp is older than the given `expirationTimestamp`,
-   *
-   * @param expirationTimestamp - if the value is not a number, data will not be cleaned
-   */
-  private _checkExpiration(expirationTimestamp?: number) {
-    let value: string | number | null = localStorage.getItem(this.keys.buildLastUpdatedKey());
-    if (value !== null) {
-      value = parseInt(value, 10);
-      if (!isNaNNumber(value) && expirationTimestamp && value < expirationTimestamp) this.clear();
-    }
-  }
-
-  // @TODO eventually remove `_checkFilterQuery`. Cache should be cleared at the storage level, reusing same logic than PluggableStorage
-  private _checkFilterQuery() {
-    const storageHashKey = this.keys.buildHashKey();
-    const storageHash = localStorage.getItem(storageHashKey);
-
-    if (storageHash !== this.storageHash) {
-      try {
-        // mark cache to update the new query filter on first successful splits fetch
-        this.updateNewFilter = true;
-
-        // if there is cache, clear it
-        if (this.checkCache()) this.clear();
-
-      } catch (e) {
-        this.log.error(LOG_PREFIX + e);
-      }
-    }
-    // if the filter didn't change, nothing is done
-  }
-
   getNamesByFlagSets(flagSets: string[]): Set<string>[] {
     return flagSets.map(flagSet => {
       const flagSetKey = this.keys.buildFlagSetKey(flagSet);
diff --git a/src/storages/inLocalStorage/__tests__/SplitsCacheInLocal.spec.ts b/src/storages/inLocalStorage/__tests__/SplitsCacheInLocal.spec.ts
index db78c741..913d6a3b 100644
--- a/src/storages/inLocalStorage/__tests__/SplitsCacheInLocal.spec.ts
+++ b/src/storages/inLocalStorage/__tests__/SplitsCacheInLocal.spec.ts
@@ -29,18 +29,11 @@ test('SPLITS CACHE / LocalStorage', () => {
   expect(cache.getSplit(something.name)).toEqual(null);
   expect(cache.getSplit(somethingElse.name)).toEqual(somethingElse);
 
-  expect(cache.checkCache()).toBe(false); // checkCache should return false until localstorage has data.
-
   expect(cache.getChangeNumber()).toBe(-1);
 
-  expect(cache.checkCache()).toBe(false); // checkCache should return false until localstorage has data.
-
   cache.setChangeNumber(123);
 
-  expect(cache.checkCache()).toBe(true); // checkCache should return true once localstorage has data.
-
   expect(cache.getChangeNumber()).toBe(123);
-
 });
 
 test('SPLITS CACHE / LocalStorage / Get Keys', () => {
@@ -106,6 +99,7 @@ test('SPLITS CACHE / LocalStorage / trafficTypeExists and ttcache tests', () =>
 
 test('SPLITS CACHE / LocalStorage / killLocally', () => {
   const cache = new SplitsCacheInLocal(fullSettings, new KeyBuilderCS('SPLITIO', 'user'));
+
   cache.addSplit(something);
   cache.addSplit(somethingElse);
   const initialChangeNumber = cache.getChangeNumber();
@@ -169,6 +163,7 @@ test('SPLITS CACHE / LocalStorage / flag set cache tests', () => {
       }
     }
   }, new KeyBuilderCS('SPLITIO', 'user'));
+
   const emptySet = new Set([]);
 
   cache.update([
@@ -208,25 +203,25 @@ test('SPLITS CACHE / LocalStorage / flag set cache tests', () => {
 
 // if FlagSets are not defined, it should store all FlagSets in memory.
 test('SPLIT CACHE / LocalStorage / flag set cache tests without filters', () => {
-  const cacheWithoutFilters = new SplitsCacheInLocal(fullSettings, new KeyBuilderCS('SPLITIO', 'user'));
+  const cache = new SplitsCacheInLocal(fullSettings, new KeyBuilderCS('SPLITIO', 'user'));
+
   const emptySet = new Set([]);
 
-  cacheWithoutFilters.update([
+  cache.update([
     featureFlagOne,
     featureFlagTwo,
     featureFlagThree,
   ], [], -1);
-  cacheWithoutFilters.addSplit(featureFlagWithEmptyFS);
+  cache.addSplit(featureFlagWithEmptyFS);
 
-  expect(cacheWithoutFilters.getNamesByFlagSets(['o'])).toEqual([new Set(['ff_one', 'ff_two'])]);
-  expect(cacheWithoutFilters.getNamesByFlagSets(['n'])).toEqual([new Set(['ff_one'])]);
-  expect(cacheWithoutFilters.getNamesByFlagSets(['e'])).toEqual([new Set(['ff_one', 'ff_three'])]);
-  expect(cacheWithoutFilters.getNamesByFlagSets(['t'])).toEqual([new Set(['ff_two', 'ff_three'])]);
-  expect(cacheWithoutFilters.getNamesByFlagSets(['y'])).toEqual([emptySet]);
-  expect(cacheWithoutFilters.getNamesByFlagSets(['o', 'n', 'e'])).toEqual([new Set(['ff_one', 'ff_two']), new Set(['ff_one']), new Set(['ff_one', 'ff_three'])]);
+  expect(cache.getNamesByFlagSets(['o'])).toEqual([new Set(['ff_one', 'ff_two'])]);
+  expect(cache.getNamesByFlagSets(['n'])).toEqual([new Set(['ff_one'])]);
+  expect(cache.getNamesByFlagSets(['e'])).toEqual([new Set(['ff_one', 'ff_three'])]);
+  expect(cache.getNamesByFlagSets(['t'])).toEqual([new Set(['ff_two', 'ff_three'])]);
+  expect(cache.getNamesByFlagSets(['y'])).toEqual([emptySet]);
+  expect(cache.getNamesByFlagSets(['o', 'n', 'e'])).toEqual([new Set(['ff_one', 'ff_two']), new Set(['ff_one']), new Set(['ff_one', 'ff_three'])]);
 
   // Validate that the feature flag cache is cleared when calling `clear` method
-  cacheWithoutFilters.clear();
-  expect(localStorage.length).toBe(1); // only 'SPLITIO.hash' should remain in localStorage
-  expect(localStorage.key(0)).toBe('SPLITIO.hash');
+  cache.clear();
+  expect(localStorage.length).toBe(0);
 });
diff --git a/src/storages/inLocalStorage/__tests__/validateCache.spec.ts b/src/storages/inLocalStorage/__tests__/validateCache.spec.ts
new file mode 100644
index 00000000..27050a56
--- /dev/null
+++ b/src/storages/inLocalStorage/__tests__/validateCache.spec.ts
@@ -0,0 +1,125 @@
+import { validateCache } from '../validateCache';
+
+import { KeyBuilderCS } from '../../KeyBuilderCS';
+import { fullSettings } from '../../../utils/settingsValidation/__tests__/settings.mocks';
+import { SplitsCacheInLocal } from '../SplitsCacheInLocal';
+import { nearlyEqual } from '../../../__tests__/testUtils';
+import { MySegmentsCacheInLocal } from '../MySegmentsCacheInLocal';
+
+const FULL_SETTINGS_HASH = '404832b3';
+
+describe('validateCache', () => {
+  const keys = new KeyBuilderCS('SPLITIO', 'user');
+  const logSpy = jest.spyOn(fullSettings.log, 'info');
+  const segments = new MySegmentsCacheInLocal(fullSettings.log, keys);
+  const largeSegments = new MySegmentsCacheInLocal(fullSettings.log, keys);
+  const splits = new SplitsCacheInLocal(fullSettings, keys);
+
+  jest.spyOn(splits, 'clear');
+  jest.spyOn(splits, 'getChangeNumber');
+  jest.spyOn(segments, 'clear');
+  jest.spyOn(largeSegments, 'clear');
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+    localStorage.clear();
+  });
+
+  test('if there is no cache, it should return false', () => {
+    expect(validateCache({}, fullSettings, keys, splits, segments, largeSegments)).toBe(false);
+
+    expect(logSpy).not.toHaveBeenCalled();
+
+    expect(splits.clear).not.toHaveBeenCalled();
+    expect(segments.clear).not.toHaveBeenCalled();
+    expect(largeSegments.clear).not.toHaveBeenCalled();
+    expect(splits.getChangeNumber).toHaveBeenCalledTimes(1);
+
+    expect(localStorage.getItem(keys.buildHashKey())).toBe(FULL_SETTINGS_HASH);
+    expect(localStorage.getItem(keys.buildLastClear())).toBeNull();
+  });
+
+  test('if there is cache and it must not be cleared, it should return true', () => {
+    localStorage.setItem(keys.buildSplitsTillKey(), '1');
+    localStorage.setItem(keys.buildHashKey(), FULL_SETTINGS_HASH);
+
+    expect(validateCache({}, fullSettings, keys, splits, segments, largeSegments)).toBe(true);
+
+    expect(logSpy).not.toHaveBeenCalled();
+
+    expect(splits.clear).not.toHaveBeenCalled();
+    expect(segments.clear).not.toHaveBeenCalled();
+    expect(largeSegments.clear).not.toHaveBeenCalled();
+    expect(splits.getChangeNumber).toHaveBeenCalledTimes(1);
+
+    expect(localStorage.getItem(keys.buildHashKey())).toBe(FULL_SETTINGS_HASH);
+    expect(localStorage.getItem(keys.buildLastClear())).toBeNull();
+  });
+
+  test('if there is cache and it has expired, it should clear cache and return false', () => {
+    localStorage.setItem(keys.buildSplitsTillKey(), '1');
+    localStorage.setItem(keys.buildHashKey(), FULL_SETTINGS_HASH);
+    localStorage.setItem(keys.buildLastUpdatedKey(), Date.now() - 1000 * 60 * 60 * 24 * 2 + ''); // 2 days ago
+
+    expect(validateCache({ expirationDays: 1 }, fullSettings, keys, splits, segments, largeSegments)).toBe(false);
+
+    expect(logSpy).toHaveBeenCalledWith('storage:localstorage: Cache expired more than 1 days ago. Cleaning up cache');
+
+    expect(splits.clear).toHaveBeenCalledTimes(1);
+    expect(segments.clear).toHaveBeenCalledTimes(1);
+    expect(largeSegments.clear).toHaveBeenCalledTimes(1);
+
+    expect(localStorage.getItem(keys.buildHashKey())).toBe(FULL_SETTINGS_HASH);
+    expect(nearlyEqual(parseInt(localStorage.getItem(keys.buildLastClear()) as string), Date.now())).toBe(true);
+  });
+
+  test('if there is cache and its hash has changed, it should clear cache and return false', () => {
+    localStorage.setItem(keys.buildSplitsTillKey(), '1');
+    localStorage.setItem(keys.buildHashKey(), FULL_SETTINGS_HASH);
+
+    expect(validateCache({}, { ...fullSettings, core: { ...fullSettings.core, authorizationKey: 'another' } }, keys, splits, segments, largeSegments)).toBe(false);
+
+    expect(logSpy).toHaveBeenCalledWith('storage:localstorage: SDK key, flags filter criteria, or flags spec version has changed. Cleaning up cache');
+
+    expect(splits.clear).toHaveBeenCalledTimes(1);
+    expect(segments.clear).toHaveBeenCalledTimes(1);
+    expect(largeSegments.clear).toHaveBeenCalledTimes(1);
+
+    expect(localStorage.getItem(keys.buildHashKey())).toBe('aa4877c2');
+    expect(nearlyEqual(parseInt(localStorage.getItem(keys.buildLastClear()) as string), Date.now())).toBe(true);
+  });
+
+  test('if there is cache and clearOnInit is true, it should clear cache and return false', () => {
+    // Older cache version (without last clear)
+    localStorage.setItem(keys.buildSplitsTillKey(), '1');
+    localStorage.setItem(keys.buildHashKey(), FULL_SETTINGS_HASH);
+
+    expect(validateCache({ clearOnInit: true }, fullSettings, keys, splits, segments, largeSegments)).toBe(false);
+
+    expect(logSpy).toHaveBeenCalledWith('storage:localstorage: clearOnInit was set and cache was not cleared in the last 24 hours. Cleaning up cache');
+
+    expect(splits.clear).toHaveBeenCalledTimes(1);
+    expect(segments.clear).toHaveBeenCalledTimes(1);
+    expect(largeSegments.clear).toHaveBeenCalledTimes(1);
+
+    expect(localStorage.getItem(keys.buildHashKey())).toBe(FULL_SETTINGS_HASH);
+    const lastClear = localStorage.getItem(keys.buildLastClear());
+    expect(nearlyEqual(parseInt(lastClear as string), Date.now())).toBe(true);
+
+    // If cache is cleared, it should not clear again until a day has passed
+    logSpy.mockClear();
+    localStorage.setItem(keys.buildSplitsTillKey(), '1');
+    expect(validateCache({ clearOnInit: true }, fullSettings, keys, splits, segments, largeSegments)).toBe(true);
+    expect(logSpy).not.toHaveBeenCalled();
+    expect(localStorage.getItem(keys.buildLastClear())).toBe(lastClear); // Last clear should not have changed
+
+    // If a day has passed, it should clear again
+    localStorage.setItem(keys.buildLastClear(), (Date.now() - 1000 * 60 * 60 * 24 - 1) + '');
+    expect(validateCache({ clearOnInit: true }, fullSettings, keys, splits, segments, largeSegments)).toBe(false);
+    expect(logSpy).toHaveBeenCalledWith('storage:localstorage: clearOnInit was set and cache was not cleared in the last 24 hours. Cleaning up cache');
+    expect(splits.clear).toHaveBeenCalledTimes(2);
+    expect(segments.clear).toHaveBeenCalledTimes(2);
+    expect(largeSegments.clear).toHaveBeenCalledTimes(2);
+    expect(nearlyEqual(parseInt(localStorage.getItem(keys.buildLastClear()) as string), Date.now())).toBe(true);
+  });
+});
diff --git a/src/storages/inLocalStorage/index.ts b/src/storages/inLocalStorage/index.ts
index c621141d..616bb7d7 100644
--- a/src/storages/inLocalStorage/index.ts
+++ b/src/storages/inLocalStorage/index.ts
@@ -7,22 +7,19 @@ import { KeyBuilderCS, myLargeSegmentsKeyBuilder } from '../KeyBuilderCS';
 import { isLocalStorageAvailable } from '../../utils/env/isLocalStorageAvailable';
 import { SplitsCacheInLocal } from './SplitsCacheInLocal';
 import { MySegmentsCacheInLocal } from './MySegmentsCacheInLocal';
-import { DEFAULT_CACHE_EXPIRATION_IN_MILLIS } from '../../utils/constants/browser';
 import { InMemoryStorageCSFactory } from '../inMemory/InMemoryStorageCS';
 import { LOG_PREFIX } from './constants';
 import { STORAGE_LOCALSTORAGE } from '../../utils/constants';
 import { shouldRecordTelemetry, TelemetryCacheInMemory } from '../inMemory/TelemetryCacheInMemory';
 import { UniqueKeysCacheInMemoryCS } from '../inMemory/UniqueKeysCacheInMemoryCS';
 import { getMatching } from '../../utils/key';
-
-export interface InLocalStorageOptions {
-  prefix?: string
-}
+import { validateCache } from './validateCache';
+import SplitIO from '../../../types/splitio';
 
 /**
  * InLocal storage factory for standalone client-side SplitFactory
  */
-export function InLocalStorage(options: InLocalStorageOptions = {}): IStorageSyncFactory {
+export function InLocalStorage(options: SplitIO.InLocalStorageOptions = {}): IStorageSyncFactory {
 
   const prefix = validatePrefix(options.prefix);
 
@@ -37,9 +34,8 @@ export function InLocalStorage(options: InLocalStorageOptions = {}): IStorageSyn
     const { settings, settings: { log, scheduler: { impressionsQueueSize, eventsQueueSize } } } = params;
     const matchingKey = getMatching(settings.core.key);
     const keys = new KeyBuilderCS(prefix, matchingKey);
-    const expirationTimestamp = Date.now() - DEFAULT_CACHE_EXPIRATION_IN_MILLIS;
 
-    const splits = new SplitsCacheInLocal(settings, keys, expirationTimestamp);
+    const splits = new SplitsCacheInLocal(settings, keys);
     const segments = new MySegmentsCacheInLocal(log, keys);
     const largeSegments = new MySegmentsCacheInLocal(log, myLargeSegmentsKeyBuilder(prefix, matchingKey));
 
@@ -53,6 +49,10 @@ export function InLocalStorage(options: InLocalStorageOptions = {}): IStorageSyn
       telemetry: shouldRecordTelemetry(params) ? new TelemetryCacheInMemory(splits, segments) : undefined,
       uniqueKeys: new UniqueKeysCacheInMemoryCS(),
 
+      validateCache() {
+        return validateCache(options, settings, keys, splits, segments, largeSegments);
+      },
+
       destroy() { },
 
       // When using shared instantiation with MEMORY we reuse everything but segments (they are customer per key).
diff --git a/src/storages/inLocalStorage/validateCache.ts b/src/storages/inLocalStorage/validateCache.ts
new file mode 100644
index 00000000..c9bd78d2
--- /dev/null
+++ b/src/storages/inLocalStorage/validateCache.ts
@@ -0,0 +1,91 @@
+import { ISettings } from '../../types';
+import { isFiniteNumber, isNaNNumber } from '../../utils/lang';
+import { getStorageHash } from '../KeyBuilder';
+import { LOG_PREFIX } from './constants';
+import type { SplitsCacheInLocal } from './SplitsCacheInLocal';
+import type { MySegmentsCacheInLocal } from './MySegmentsCacheInLocal';
+import { KeyBuilderCS } from '../KeyBuilderCS';
+import SplitIO from '../../../types/splitio';
+
+const DEFAULT_CACHE_EXPIRATION_IN_DAYS = 10;
+const MILLIS_IN_A_DAY = 86400000;
+
+/**
+ * Validates if cache should be cleared and sets the cache `hash` if needed.
+ *
+ * @returns `true` if cache should be cleared, `false` otherwise
+ */
+function validateExpiration(options: SplitIO.InLocalStorageOptions, settings: ISettings, keys: KeyBuilderCS, currentTimestamp: number, isThereCache: boolean) {
+  const { log } = settings;
+
+  // Check expiration
+  const lastUpdatedTimestamp = parseInt(localStorage.getItem(keys.buildLastUpdatedKey()) as string, 10);
+  if (!isNaNNumber(lastUpdatedTimestamp)) {
+    const cacheExpirationInDays = isFiniteNumber(options.expirationDays) && options.expirationDays >= 1 ? options.expirationDays : DEFAULT_CACHE_EXPIRATION_IN_DAYS;
+    const expirationTimestamp = currentTimestamp - MILLIS_IN_A_DAY * cacheExpirationInDays;
+    if (lastUpdatedTimestamp < expirationTimestamp) {
+      log.info(LOG_PREFIX + 'Cache expired more than ' + cacheExpirationInDays + ' days ago. Cleaning up cache');
+      return true;
+    }
+  }
+
+  // Check hash
+  const storageHashKey = keys.buildHashKey();
+  const storageHash = localStorage.getItem(storageHashKey);
+  const currentStorageHash = getStorageHash(settings);
+
+  if (storageHash !== currentStorageHash) {
+    try {
+      localStorage.setItem(storageHashKey, currentStorageHash);
+    } catch (e) {
+      log.error(LOG_PREFIX + e);
+    }
+    if (isThereCache) {
+      log.info(LOG_PREFIX + 'SDK key, flags filter criteria, or flags spec version has changed. Cleaning up cache');
+      return true;
+    }
+    return false; // No cache to clear
+  }
+
+  // Clear on init
+  if (options.clearOnInit) {
+    const lastClearTimestamp = parseInt(localStorage.getItem(keys.buildLastClear()) as string, 10);
+
+    if (isNaNNumber(lastClearTimestamp) || lastClearTimestamp < currentTimestamp - MILLIS_IN_A_DAY) {
+      log.info(LOG_PREFIX + 'clearOnInit was set and cache was not cleared in the last 24 hours. Cleaning up cache');
+      return true;
+    }
+  }
+}
+
+/**
+ * Clean cache if:
+ * - it has expired, i.e., its `lastUpdated` timestamp is older than the given `expirationTimestamp`
+ * - its hash has changed, i.e., the SDK key, flags filter criteria or flags spec version was modified
+ * - `clearOnInit` was set and cache was not cleared in the last 24 hours
+ *
+ * @returns `true` if cache is ready to be used, `false` otherwise (cache was cleared or there is no cache)
+ */
+export function validateCache(options: SplitIO.InLocalStorageOptions, settings: ISettings, keys: KeyBuilderCS, splits: SplitsCacheInLocal, segments: MySegmentsCacheInLocal, largeSegments: MySegmentsCacheInLocal): boolean {
+
+  const currentTimestamp = Date.now();
+  const isThereCache = splits.getChangeNumber() > -1;
+
+  if (validateExpiration(options, settings, keys, currentTimestamp, isThereCache)) {
+    splits.clear();
+    segments.clear();
+    largeSegments.clear();
+
+    // Update last clear timestamp
+    try {
+      localStorage.setItem(keys.buildLastClear(), currentTimestamp + '');
+    } catch (e) {
+      settings.log.error(LOG_PREFIX + e);
+    }
+
+    return false;
+  }
+
+  // Check if ready from cache
+  return isThereCache;
+}
diff --git a/src/storages/pluggable/index.ts b/src/storages/pluggable/index.ts
index ee8b1872..cc16bceb 100644
--- a/src/storages/pluggable/index.ts
+++ b/src/storages/pluggable/index.ts
@@ -88,7 +88,8 @@ export function PluggableStorage(options: PluggableStorageOptions): IStorageAsyn
     // Connects to wrapper and emits SDK_READY event on main client
     const connectPromise = wrapper.connect().then(() => {
       if (isSynchronizer) {
-        // In standalone or producer mode, clear storage if SDK key or feature flag filter has changed
+        // @TODO reuse InLocalStorage::validateCache logic
+        // In standalone or producer mode, clear storage if SDK key, flags filter criteria or flags spec version was modified
         return wrapper.get(keys.buildHashKey()).then((hash) => {
           const currentHash = getStorageHash(settings);
           if (hash !== currentHash) {
diff --git a/src/storages/types.ts b/src/storages/types.ts
index 71962254..a0ede2f1 100644
--- a/src/storages/types.ts
+++ b/src/storages/types.ts
@@ -189,8 +189,6 @@ export interface ISplitsCacheBase {
   // only for Client-Side. Returns true if the storage is not synchronized yet (getChangeNumber() === -1) or contains a FF using segments or large segments
   usesSegments(): MaybeThenable<boolean>,
   clear(): MaybeThenable<boolean | void>,
-  // should never reject or throw an exception. Instead return false by default, to avoid emitting SDK_READY_FROM_CACHE.
-  checkCache(): MaybeThenable<boolean>,
   killLocally(name: string, defaultTreatment: string, changeNumber: number): MaybeThenable<boolean>,
   getNamesByFlagSets(flagSets: string[]): MaybeThenable<Set<string>[]>
 }
@@ -205,7 +203,6 @@ export interface ISplitsCacheSync extends ISplitsCacheBase {
   trafficTypeExists(trafficType: string): boolean,
   usesSegments(): boolean,
   clear(): void,
-  checkCache(): boolean,
   killLocally(name: string, defaultTreatment: string, changeNumber: number): boolean,
   getNamesByFlagSets(flagSets: string[]): Set<string>[]
 }
@@ -220,7 +217,6 @@ export interface ISplitsCacheAsync extends ISplitsCacheBase {
   trafficTypeExists(trafficType: string): Promise<boolean>,
   usesSegments(): Promise<boolean>,
   clear(): Promise<boolean | void>,
-  checkCache(): Promise<boolean>,
   killLocally(name: string, defaultTreatment: string, changeNumber: number): Promise<boolean>,
   getNamesByFlagSets(flagSets: string[]): Promise<Set<string>[]>
 }
@@ -451,6 +447,7 @@ export interface IStorageSync extends IStorageBase<
   IUniqueKeysCacheSync
 > {
   // Defined in client-side
+  validateCache?: () => boolean, // @TODO support async
   largeSegments?: ISegmentsCacheSync,
 }
 
diff --git a/src/sync/__tests__/syncManagerOnline.spec.ts b/src/sync/__tests__/syncManagerOnline.spec.ts
index 7fda853b..c7dba96e 100644
--- a/src/sync/__tests__/syncManagerOnline.spec.ts
+++ b/src/sync/__tests__/syncManagerOnline.spec.ts
@@ -2,6 +2,7 @@ import { fullSettings } from '../../utils/settingsValidation/__tests__/settings.
 import { syncTaskFactory } from './syncTask.mock';
 import { syncManagerOnlineFactory } from '../syncManagerOnline';
 import { IReadinessManager } from '../../readiness/types';
+import { SDK_SPLITS_CACHE_LOADED } from '../../readiness/constants';
 
 jest.mock('../submitters/submitterManager', () => {
   return {
@@ -45,8 +46,10 @@ const pushManagerFactoryMock = jest.fn(() => pushManagerMock);
 test('syncManagerOnline should start or not the submitter depending on user consent status', () => {
   const settings = { ...fullSettings };
 
-  // @ts-ignore
-  const syncManager = syncManagerOnlineFactory()({ settings });
+  const syncManager = syncManagerOnlineFactory()({
+    settings, // @ts-ignore
+    storage: {},
+  });
   const submitterManager = syncManager.submitterManager!;
 
   syncManager.start();
@@ -95,7 +98,10 @@ test('syncManagerOnline should syncAll a single time when sync is disabled', ()
 
   // @ts-ignore
   // Test pushManager for main client
-  const syncManager = syncManagerOnlineFactory(() => pollingManagerMock, pushManagerFactoryMock)({ settings });
+  const syncManager = syncManagerOnlineFactory(() => pollingManagerMock, pushManagerFactoryMock)({
+    settings, // @ts-ignore
+    storage: { validateCache: () => false },
+  });
 
   expect(pushManagerFactoryMock).not.toBeCalled();
 
@@ -161,7 +167,10 @@ test('syncManagerOnline should syncAll a single time when sync is disabled', ()
   settings.sync.enabled = true;
   // @ts-ignore
   // pushManager instantiation control test
-  const testSyncManager = syncManagerOnlineFactory(() => pollingManagerMock, pushManagerFactoryMock)({ settings });
+  const testSyncManager = syncManagerOnlineFactory(() => pollingManagerMock, pushManagerFactoryMock)({
+    settings, // @ts-ignore
+    storage: { validateCache: () => false },
+  });
 
   expect(pushManagerFactoryMock).toBeCalled();
 
@@ -173,3 +182,18 @@ test('syncManagerOnline should syncAll a single time when sync is disabled', ()
   testSyncManager.stop();
 
 });
+
+test('syncManagerOnline should emit SDK_SPLITS_CACHE_LOADED if validateCache returns true', async () => {
+  const params = {
+    settings: fullSettings,
+    storage: { validateCache: () => true },
+    readiness: { splits: { emit: jest.fn() } }
+  }; // @ts-ignore
+  const syncManager = syncManagerOnlineFactory()(params);
+
+  await syncManager.start();
+
+  expect(params.readiness.splits.emit).toBeCalledWith(SDK_SPLITS_CACHE_LOADED);
+
+  syncManager.stop();
+});
diff --git a/src/sync/offline/syncTasks/fromObjectSyncTask.ts b/src/sync/offline/syncTasks/fromObjectSyncTask.ts
index 14daccf2..acbb5f52 100644
--- a/src/sync/offline/syncTasks/fromObjectSyncTask.ts
+++ b/src/sync/offline/syncTasks/fromObjectSyncTask.ts
@@ -1,6 +1,6 @@
 import { forOwn } from '../../../utils/lang';
 import { IReadinessManager } from '../../../readiness/types';
-import { ISplitsCacheSync } from '../../../storages/types';
+import { IStorageSync } from '../../../storages/types';
 import { ISplitsParser } from '../splitsParser/types';
 import { ISplit, ISplitPartial } from '../../../dtos/types';
 import { syncTaskFactory } from '../../syncTask';
@@ -15,7 +15,7 @@ import { SYNC_OFFLINE_DATA, ERROR_SYNC_OFFLINE_LOADING } from '../../../logger/c
  */
 export function fromObjectUpdaterFactory(
   splitsParser: ISplitsParser,
-  storage: { splits: ISplitsCacheSync },
+  storage: Pick<IStorageSync, 'splits' | 'validateCache'>,
   readiness: IReadinessManager,
   settings: ISettings,
 ): () => Promise<boolean> {
@@ -59,9 +59,10 @@ export function fromObjectUpdaterFactory(
 
         if (startingUp) {
           startingUp = false;
-          Promise.resolve(splitsCache.checkCache()).then(cacheReady => {
+          const isCacheLoaded = storage.validateCache ? storage.validateCache() : false;
+          Promise.resolve().then(() => {
             // Emits SDK_READY_FROM_CACHE
-            if (cacheReady) readiness.splits.emit(SDK_SPLITS_CACHE_LOADED);
+            if (isCacheLoaded) readiness.splits.emit(SDK_SPLITS_CACHE_LOADED);
             // Emits SDK_READY
             readiness.segments.emit(SDK_SEGMENTS_ARRIVED);
           });
@@ -79,7 +80,7 @@ export function fromObjectUpdaterFactory(
  */
 export function fromObjectSyncTaskFactory(
   splitsParser: ISplitsParser,
-  storage: { splits: ISplitsCacheSync },
+  storage: Pick<IStorageSync, 'splits' | 'validateCache'>,
   readiness: IReadinessManager,
   settings: ISettings
 ): ISyncTask<[], boolean> {
diff --git a/src/sync/polling/updaters/splitChangesUpdater.ts b/src/sync/polling/updaters/splitChangesUpdater.ts
index 065ecb89..7a341cd0 100644
--- a/src/sync/polling/updaters/splitChangesUpdater.ts
+++ b/src/sync/polling/updaters/splitChangesUpdater.ts
@@ -3,7 +3,7 @@ import { ISplitChangesFetcher } from '../fetchers/types';
 import { ISplit, ISplitChangesResponse, ISplitFiltersValidation } from '../../../dtos/types';
 import { ISplitsEventEmitter } from '../../../readiness/types';
 import { timeout } from '../../../utils/promise/timeout';
-import { SDK_SPLITS_ARRIVED, SDK_SPLITS_CACHE_LOADED } from '../../../readiness/constants';
+import { SDK_SPLITS_ARRIVED } from '../../../readiness/constants';
 import { ILogger } from '../../../logger/types';
 import { SYNC_SPLITS_FETCH, SYNC_SPLITS_UPDATE, SYNC_SPLITS_FETCH_FAILS, SYNC_SPLITS_FETCH_RETRY } from '../../../logger/constants';
 import { startsWith } from '../../../utils/lang';
@@ -143,7 +143,7 @@ export function splitChangesUpdaterFactory(
      */
     function _splitChangesUpdater(since: number, retry = 0): Promise<boolean> {
       log.debug(SYNC_SPLITS_FETCH, [since]);
-      const fetcherPromise = Promise.resolve(splitUpdateNotification ?
+      return Promise.resolve(splitUpdateNotification ?
         { splits: [splitUpdateNotification.payload], till: splitUpdateNotification.changeNumber } :
         splitChangesFetcher(since, noCache, till, _promiseDecorator)
       )
@@ -154,8 +154,6 @@ export function splitChangesUpdaterFactory(
 
           log.debug(SYNC_SPLITS_UPDATE, [mutation.added.length, mutation.removed.length, mutation.segments.length]);
 
-          // Write into storage
-          // @TODO call `setChangeNumber` only if the other storage operations have succeeded, in order to keep storage consistency
           return Promise.all([
             splits.update(mutation.added, mutation.removed, splitChanges.till),
             segments.registerSegments(mutation.segments)
@@ -185,15 +183,6 @@ export function splitChangesUpdaterFactory(
           }
           return false;
         });
-
-      // After triggering the requests, if we have cached splits information let's notify that to emit SDK_READY_FROM_CACHE.
-      // Wrapping in a promise since checkCache can be async.
-      if (splitsEventEmitter && startingUp) {
-        Promise.resolve(splits.checkCache()).then(isCacheReady => {
-          if (isCacheReady) splitsEventEmitter.emit(SDK_SPLITS_CACHE_LOADED);
-        });
-      }
-      return fetcherPromise;
     }
 
     let sincePromise = Promise.resolve(splits.getChangeNumber()); // `getChangeNumber` never rejects or throws error
diff --git a/src/sync/syncManagerOnline.ts b/src/sync/syncManagerOnline.ts
index 5410c17f..aed32493 100644
--- a/src/sync/syncManagerOnline.ts
+++ b/src/sync/syncManagerOnline.ts
@@ -9,6 +9,7 @@ import { SYNC_START_POLLING, SYNC_CONTINUE_POLLING, SYNC_STOP_POLLING } from '..
 import { isConsentGranted } from '../consent';
 import { POLLING, STREAMING, SYNC_MODE_UPDATE } from '../utils/constants';
 import { ISdkFactoryContextSync } from '../sdkFactory/types';
+import { SDK_SPLITS_CACHE_LOADED } from '../readiness/constants';
 
 /**
  * Online SyncManager factory.
@@ -28,7 +29,7 @@ export function syncManagerOnlineFactory(
    */
   return function (params: ISdkFactoryContextSync): ISyncManagerCS {
 
-    const { settings, settings: { log, streamingEnabled, sync: { enabled: syncEnabled } },  telemetryTracker } = params;
+    const { settings, settings: { log, streamingEnabled, sync: { enabled: syncEnabled } }, telemetryTracker, storage, readiness } = params;
 
     /** Polling Manager */
     const pollingManager = pollingManagerFactory && pollingManagerFactory(params);
@@ -87,6 +88,11 @@ export function syncManagerOnlineFactory(
       start() {
         running = true;
 
+        if (startFirstTime) {
+          const isCacheLoaded = storage.validateCache ? storage.validateCache() : false;
+          if (isCacheLoaded) Promise.resolve().then(() => { readiness.splits.emit(SDK_SPLITS_CACHE_LOADED); });
+        }
+
         // start syncing splits and segments
         if (pollingManager) {
 
@@ -96,7 +102,6 @@ export function syncManagerOnlineFactory(
               // Doesn't call `syncAll` when the syncManager is resuming
               if (startFirstTime) {
                 pollingManager.syncAll();
-                startFirstTime = false;
               }
               pushManager.start();
             } else {
@@ -105,13 +110,14 @@ export function syncManagerOnlineFactory(
           } else {
             if (startFirstTime) {
               pollingManager.syncAll();
-              startFirstTime = false;
             }
           }
         }
 
         // start periodic data recording (events, impressions, telemetry).
         submitterManager.start(!isConsentGranted(settings));
+
+        startFirstTime = false;
       },
 
       /**
diff --git a/src/utils/constants/browser.ts b/src/utils/constants/browser.ts
deleted file mode 100644
index d627f780..00000000
--- a/src/utils/constants/browser.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-// This value might be eventually set via a config parameter
-export const DEFAULT_CACHE_EXPIRATION_IN_MILLIS = 864000000; // 10 days
diff --git a/src/utils/lang/index.ts b/src/utils/lang/index.ts
index 11b6afd0..b1a7e35a 100644
--- a/src/utils/lang/index.ts
+++ b/src/utils/lang/index.ts
@@ -120,7 +120,7 @@ export function isBoolean(val: any): boolean {
  * Unlike `Number.isFinite`, it also tests Number object instances.
  * Unlike global `isFinite`, it returns false if the value is not a number or Number object instance.
  */
-export function isFiniteNumber(val: any): boolean {
+export function isFiniteNumber(val: any): val is number {
   if (val instanceof Number) val = val.valueOf();
   return typeof val === 'number' ?
     Number.isFinite ? Number.isFinite(val) : isFinite(val) :
diff --git a/src/utils/settingsValidation/storage/storageCS.ts b/src/utils/settingsValidation/storage/storageCS.ts
index f7b531fc..7d58af3d 100644
--- a/src/utils/settingsValidation/storage/storageCS.ts
+++ b/src/utils/settingsValidation/storage/storageCS.ts
@@ -8,7 +8,7 @@ import { IStorageFactoryParams, IStorageSync } from '../../../storages/types';
 
 export function __InLocalStorageMockFactory(params: IStorageFactoryParams): IStorageSync {
   const result = InMemoryStorageCSFactory(params);
-  result.splits.checkCache = () => true; // to emit SDK_READY_FROM_CACHE
+  result.validateCache = () => true; // to emit SDK_READY_FROM_CACHE
   return result;
 }
 __InLocalStorageMockFactory.type = STORAGE_MEMORY;
diff --git a/types/splitio.d.ts b/types/splitio.d.ts
index 4102a7fc..d8a1e67d 100644
--- a/types/splitio.d.ts
+++ b/types/splitio.d.ts
@@ -947,6 +947,18 @@ declare namespace SplitIO {
      * @defaultValue `'SPLITIO'`
      */
     prefix?: string;
+    /**
+     * Number of days before cached data expires if it was not updated. If cache expires, it is cleared on initialization.
+     *
+     * @defaultValue `10`
+     */
+    expirationDays?: number;
+    /**
+     * Optional settings to clear the cache. If set to `true`, the SDK clears the cached data on initialization, unless the cache was cleared within the last 24 hours.
+     *
+     * @defaultValue `false`
+     */
+    clearOnInit?: boolean;
   }
   /**
    * Storage for asynchronous (consumer) SDK.
@@ -1270,11 +1282,23 @@ declare namespace SplitIO {
        */
       type?: BrowserStorage;
       /**
-       * Optional prefix to prevent any kind of data collision between SDK versions.
+       * Optional prefix to prevent any kind of data collision between SDK versions when using 'LOCALSTORAGE'.
        *
        * @defaultValue `'SPLITIO'`
        */
       prefix?: string;
+      /**
+       * Optional settings for the 'LOCALSTORAGE' storage type. It specifies the number of days before cached data expires if it was not updated. If cache expires, it is cleared on initialization.
+       *
+       * @defaultValue `10`
+       */
+      expirationDays?: number;
+      /**
+       * Optional settings for the 'LOCALSTORAGE' storage type. If set to `true`, the SDK clears the cached data on initialization, unless the cache was cleared within the last 24 hours.
+       *
+       * @defaultValue `false`
+       */
+      clearOnInit?: boolean;
     };
   }
   /**