https://developer.android.com/studio/debug/apk-analyzer

https://apktool.org/

https://github.com/iBotPeaches/Apktool

https://www.decompiler.com/jar/3a64c48b42354550b00fa1c4dc4af2ec/ECC%20BluetoothChat_1.5_APKPure.apk/sources/com/ecc/android/bluetoothchatappstore

https://apkpure.com/ecc-bluetoothchat/com.ecc.android.bluetoothchatappstore

jadx ECC\ BluetoothChat_1.5_APKPure.apk -e

https://github.com/compwron/ecc-bluetoothchat-2