I'm new with React Native and i would like to know after closing my application the AsyncStorage is clear or not. Is there any alternatives for AsyncStorage.
When you use AsyncStorage, your app is going to persist the data on the storage system that is global to the app.
You can see how it works and the methods available from the oficial's docs https://facebook.github.io/react-native/docs/asyncstorage.html#asyncstorage