ReactRaptor: Find out which Android apps are built with Expo

ReactRaptor is an Android tool designed to identify whether mobile apps are developed using React Native or Expo by scanning the assets and native libraries within APK files. Created out of a curiosity about app development and a desire to fill a gap left by existing tools like LibChecker, ReactRaptor was built with the aid of AI tools to navigate Kotlin and Android APIs. It detects specific libraries and files, like the "index.android.bundle," to determine the presence of React Native and Expo components. The tool requires specific permissions to access installed apps and uses coroutines to address performance issues during file analysis. ReactRaptor highlights that many popular apps, such as Coinbase, Discord, and Amazon, utilize React Native and Expo to varying extents. Available on the Google Play Store, ReactRaptor allows users to explore the underlying technologies of apps on their devices, and its source code is accessible on GitHub for those interested in further exploration.

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