I am having problems on my Samsung galaxy S4. Is the app still supported there?
Boldbeast Recorder V13.7 and older versions support Android 4.1 up phones.
Boldbeast Recorder V13.8 and newer versions support Android 5.0 up phones.
So if your Galaxy S4 is running Android 4.x you should use Boldbeast Recorder V13.7, otherwise you can use the latest version of the app.