Release 4.3.2

4.3.2 (2026-06-22)

✨ Features

• Add checkContentChanged() and reactively listen to it in hooks (#1071) (b47ba40)
• Add recoveryStrategy config option (#1066) (9f29037)
• Add support for Harness web (#1032) (90dae50)
• Bump MMKV Core fork to add support for react-native 87 (#1074) (423fa94)

💨 Performance Improvements

• report MMKV external memory size (#1068) (87f408e)

🐛 Bug Fixes

• Fix length being incorrect in MMKV Web (#1041) (c070d20)

📚 Documentation

• fix README object example comment and deprecated size usage (#1073) (1cd3363)
• Update react-native-mmkv version requirements (#1038) (47d5251)

Release 4.3.1

4.3.1 (2026-04-07)

🐛 Bug Fixes

• Fix set(ArrayBuffer) on Web (#1026) (3df2075)
• Fix build, replace TurboReactPackage with BaseReactPackage (#1033) (b98f223)

Release 4.3.0

4.3.0 (2026-03-20)

✨ Features

• Add compareBeforeSet (#1018) (d6045f9)
• Make default MMKV log level configurable at build time (#995) (e43b3e0)
• Upgrade mmkv version on Android (#1016) (fd77012)
• Upgrade to MMKV 2.4.0 on iOS (#1017) (0326337)

🐛 Bug Fixes

• Add tests for compareBeforeSet (#1020) (bf238b7)
• Uncomment isEncrypted tests now that this flag properly works (#1019) (1760ddf)

📚 Documentation

• Update to new webp banner (59f42db)

Release 4.2.0

4.2.0 (2026-03-04)

‼️ Nitro 0.35.0

This release of react-native-mmkv requires react-native-nitro-modules 0.35.0 or higher.

✨ Features

• Add .length (key length vs byteSize) (#998) (e479e29)
• Add encrypt(..)/decrypt() with EncryptionType (#996) (23f50d2)
• Add isEncrypted (#997) (3afd318)
• Add support for AES-256 encryption (#991) (2de7915)

🐛 Bug Fixes

• Upgrade to Nitro 0.35.0 (#1010) (32be519)
• Use useSyncExternalStore() for hooks (#1008) (e0325ec)

Release 4.1.2

4.1.2 (2026-01-28)

🐛 Bug Fixes

• Fix duplicate libNitroModules.so libs (#992) (3b89ba2)

Release 4.1.1

4.1.1 (2026-01-07)

🐛 Bug Fixes

• Upgrade Nitro to 0.32.1 (#981) (c2f2028)

Release 4.1.0

4.1.0 (2025-12-04)

✨ Features

• Add existsMMKV(...) and deleteMMKV(...) (#968) (7bc10b1)
• Add importAllFrom(...) (#969) (5eefde9)

🐛 Bug Fixes

• Fix the harness tests for existsMMKV and deleteMMKV (#970) (444d3fd)
• Remove z and c++ libraries from podspec (#959) (8cd48e3)

📚 Documentation

• update react-query integration docs (#960) (5e8fbe3)
• Update Tinybase MMKV documentation link (#961) (3689c35)

Release 4.0.1

4.0.1 (2025-11-18)

✨ Features

• Add MMKV.id (#953) (5d8eb56)

🐛 Bug Fixes

• Fix build step in actions (#949) (c870593)
• Fix incorrect return of remove on Web (#957) (4fc2863)
• Upgrade to Nitro 0.31.7 (27e69df)

📚 Documentation

• Replace Flipper with Rozenite for MMKV debugging (#950) (d9e58b3)

Release 4.0.0

4.0.0 (2025-10-20)

react-native-mmkv V4 is the next major evolution of the library - it features:

• A full rewrite to Nitro! 🔥
  • ..this implies that V4 now works again on the old-architecture, until react-native 0.82 at least.
• react-native-mmkv V4 now uses MMKVCore from CocoaPods/Gradle instead of shipping it as source - this means you can use the native MMKV library from your native code again without causing duplicate symbols!
• Make set(...) throw a useful Error when the value couldn't be saved
• Adds useMMKVKeys()
• Make remove(...) return a bool
• Add AppGroup again
• Make remove(...) and clearAllKeys() invoke listeners properly

‼️ Before upgrading, please read the V4 upgrade guide. ‼️

✨ Features

• add React Native Harness (#918) (cbcb4bd)
• Throw if set(...) was not successful (#921) (0d3b833)
• Upgrade MMKVCore to 2.2.4 (Android) (#912) (cf77676)
• Upgrade Nitro to 0.30.0 (#923) (03dd7c9)
• Upgrade to Nitro 0.31 (#929) (176e4f3)
• Upgrade to react-native 0.82.0 (#930) (5f7d595)

🐛 Bug Fixes

• Fix example app build for Xcode 26 (#922) (965a549)
• Notify listeners when keys get removed (remove/clearAll) (#920) (09643c3)
• Throw if key is empty in set(...) (#919) (3d3b793)

Release 4.0.0-beta.12

4.0.0-beta.12 (2025-09-26)

This release removes the need to manually add MMKVCore to your Podfile. If you have it in your Podfile, remove it:

- pod 'MMKVCore', :defines_modules => true

✨ Features

• Update MMKVCore to 2.2.4 which defines Modules (#910) (ddaf5a8)

🐛 Bug Fixes

• Fix example app bundle identifiers (#906) (0be150e)

📚 Documentation

• Point V3 README links to V3 branch docs (16f6cef)