A free app for Android, by jApp.

Flat Equalizer – Bass Booster & Volume Booster is an amazing Android audio control app that will let you make your music sound louder and more immersive. With it, you can listen to the top songs from your library in a new, exciting way.

Equalizer

The Flat Equalizer – Bass Booster & Volume Booster app includes a 10-band Equalizer that lets you adjust the sound of your music and videos to match your taste.

Bass Boost

Want to get the best sound? Just turn up the bass. It can be a little bit too loud, but the good news is that you can adjust the level of the bass without losing the overall sound quality.

Volume Booster

The Volume Booster will help you increase the volume of your music and other audio files without losing the quality. It can be a little bit too loud, so you can adjust the volume to get the right level.