Editing audio or video? You're in for some good news for Video to MP3 Converter - MP3 will be your go-to editing app. Powerful and reliable, Video to MP3 Converter - MP3 lets you convert videos to audio files, trim audio or video, or merge audio right from your phone. 

Merging multiple audio files is easy since the app only requires you to tap “add file” and “merge” to create a remixed version of your favorite songs.  What's more, you can use your newly merged audio files as your ringtone or share them with your friends. 

Video to MP3 Converter - MP3 is compatible with most Android devices, so long as their Android version is 4.2 and newer. It's free to download on the Play Store, too.