react-native-mmkv-storage

This library aims to provide a fast & reliable solution for you data storage needs in react-native apps. It uses [MMKV](https://github.com/Tencent/MMKV) by Tencent under the hood on Android and iOS both that is used by their WeChat app(more than 1 Billion

@capacitor/preferences

The Preferences API provides a simple key/value persistent store for lightweight data.

universalify

Make a callback- or promise-based function support both promises and callbacks.