React Native MMKV vs AsyncStorage: 30x Faster Storage with Nitro Modules in 2026
react-native-mmkv v4 is now a Nitro Module - synchronous, JSI-backed, and roughly 30x faster than AsyncStorage. This 2026 guide covers how MMKV works, real benchmark numbers, install steps for Expo and bare React Native, encryption, and a complete AsyncStorage migration path.