I want to store sensitive data locally in a React Native app.
Is the data only available to the app that wrote it?
From react-native doc - https://facebook.github.io/react-native/docs/asyncstorage.html
AsyncStorage is a simple, unencrypted, asynchronous, persistent, key-value storage system that is global to the app.
Its not secure as it stores key-value pairs in unencrypted form on device.
It used keychain for iOS and KeyStore for Android for storing data securely.