Amp3converter is a free tool to encode any audio files to mp3.
Is easy to use and has a file browser included.
Features:
-Encode all kind of audio formats to mp3 file.
-Extract audio from movies to mp3 file.
-Optimized for all devices armv7 and neon extensions.
-Really fast encoding in Android.
-Hi quality and low quality options.
-Tested in many devices and compatible with all Android versions.
This app uses libffmpeg and lamelib to encode and decode.
Bugs are welcome, send mail to developer team.