What is the best way to store private data in react-native?

What is the best way to store private data in react-native?

I would recommend using a library like react-native-keychain to store private data in react-native

You can use it like that:

// Generic Password, service argument optional
Keychain
  .setGenericPassword(username, password)
  .then(function() {
    console.log('Credentials saved successfully!');
  });

// service argument optional
Keychain
  .getGenericPassword()
  .then(function(credentials) {
    console.log('Credentials successfully loaded for user ' + credentials.username);
  }).catch(function(error) {
    console.log('Keychain couldn\'t be accessed! Maybe no value set?', error);
  });

I hope my answer was helpful 😊

Expo.SecureStore provides a way to encrypt and securely store key–value pairs locally on the device.

Use SecureStore.setItemAsync(key, value, options) to store and SecureStore.getItemAsync(key, options) to retrieve data.

Documentation: https://docs.expo.io/versions/latest/sdk/securestore