Android

APK (Android Package) files are the standard format for applications used on the Android platform.

JADX is a command line and GUI decompiler for Android Dex and Apk files.

APKTool is a tool for reverse engineering and modifying APK files.

AAB (Android App Bundle) is a more recent format that supports multiple APKs for different platforms, locales and screen sizes.

To extract the APKs from an AAB file, bundletool can be used.

bundletool build-apks --bundle=/path/to/app.aab --output=/path/to/output.apks

To extract the APKs from the APKS file, use a tool like 7zip.