A free app for Android, by Dreams Room.

There are times when you wish to listen to a certain audio file at maximum volume but you’re not sure if your device can do it. And it’s not just for audio files, but for all media files, including video, movies, and even audiobooks. But we can solve this problem with a simple solution: use this app that is capable of boosting the sound of your audio files.

And that’s not all, this app can also boost the volume of your external speakers. So now, you can listen to your favorite audio files at a maximum volume even if you’re using your external speakers.