Async Storage

RN async, persistent, key-value storage system

https://github.com/react-native-async-storage/async-storage

MMKV

...fastest key/value storage... ~30x faster than AsyncStorage!

https://github.com/mrousavy/react-native-mmkv

Sync - Firebase

https://rnfirebase.io

WatermelonDB

Reactive & async DB, scales, stays fast

https://github.com/Nozbe/WatermelonDB

Realm

mobile DB alternative to SQLite & key-value stores

https://github.com/realm/realm-js

PouchDB

w async storage

https://github.com/seigel/pouchdb-react-native

SQLite

expo-sqlite

https://github.com/expo/expo/tree/master/packages/expo-sqlite

react-native-sqlite-storage

https://github.com/andpor/react-native-sqlite-storage

react-native-sqlite-2

https://github.com/craftzdog/react-native-sqlite-2