Realm News is the blog of the Realm mobile database company, with posts on Swift, Kotlin, Android, and iOS development talks.
HN commenters link it for conference talk write-ups, such as reverse engineering iOS apps, and for its posts on Swift on Android.
You probably don't need Redux if it's just simple persistence of data.
The simplest option is just to read and write a blob of JSON using the AsyncStorage API: https://facebook.github.io/react-native/docs/asyncstorage.html
Another option you could try is Realm, which is commercial but has a free tier (even for commercial apps) and has a pretty simple API: https://news.realm.io/news/introducing-realm-react-native/
Another is the SQLite module which comes with Expo:
Docs: https://docs.expo.io/versions/v16.0.0/sdk/sqlite.html
Example: https://github.com/expo/sqlite-example/blob/master/main.js
I gave an intro of sorts here for iOS: https://news.realm.io/news/conrad-kramer-reverse-engineering-ios-apps-lyft/
Watch: https://news.realm.io/news/tryswift-chris-robert-end-to-end-application-development-swift-backend/
Swift on Android already exists.
https://news.realm.io/news/swift-on-android/