react-native-aws-cognito-js

Uses React Native bridge and native modules to handle intensive math operations on the device, improving performance for cryptographic tasks in authentication, as highlighted in the README's feature list.

Synchronizes MemoryStorage with AsyncStorage via a sync method, allowing authentication data to persist across app restarts, which is explicitly demonstrated in the usage examples.

Maintains compatibility with the AWS SDK for JavaScript (React Native version), enabling seamless integration with other AWS services, as shown in the advanced example with AWS.config updates.

Provides classes like CognitoUser and CognitoUserPool that mirror the AWS SDK, giving developers direct control over authentication flows, as evidenced by the detailed code samples.