Proton Movies This is an audio player that makes it easy to move back and forth in your audio files.
Features:
* Speed control (Android 4.1 and above)
* Window mode (Player floats above other apps)
* Programmable forward and backward buttons
* Loop intervals

Perfect for transcribing interviews or listening to audiobooks.

Premium subscription includes:
* Remove ads.
* Use with media keys from bluetooth keyboard or headset. (next and previous make short skips)
* Option to override the volume button when screen is off (Not supported by all devices. If your device does not support it you will not see the option in the settings menu.).