A full version app for Android, by WetcRun.

Equalizer – Bass Booster pro is a professional equalizer for Android phones. It can not only increase the volume of media players such as Spotify, Deezer, Youtube, and Facebook, but also can boost the bass and increase the volume of your Android phone. The media equalizer supports all popular music players such as YouTube, Spotify, Deezer, and Facebook. It can also increase the volume of the phone system, alarm, and message. It has six volume modes for you to choose, including normal, meeting, outdoor, mute, sleep, and custom. You can choose these modes according to your situation.

It can also increase the volume of media players and the phone system, alarm, and message.