A free app for Android, by Mobile Apps Studio.

Developed by Mobile Apps Studio, Microphone Amplifier is a sound platform that improves the quality of your recordings.

It is designed to catch – in the highest quality possible – the sound around you, claiming to provide an audio gain of 50 levels. It features a sound oscilloscope for even better output.

You will be given the controls to the output filter and input filter – which you can manually configure using a slide.

In addition, you can save the final product directly as an mp3 file. You can also use the app to simply convert media files into mp3 format – without the hassle.