A free app for Android, by Bdroid Team.

This is the best app to make ringtones from your favorite songs and videos. It’s super easy to use and can help you to make a great-sounding ringtone for free. It supports MP3, AAC, AAC LC, OGG, WAV, FLAC, WMA, OPUS, etc. 

This application is a powerful audio editor that can cut, mix, merge and convert your audio files. With this app, you can combine multiple audio clips into one file or combine multiple files into one. You can set the starting and ending points for each clip, so you can easily cut clips to the length you need. You can even set the number of clips to combine and the sound to mix and convert your audio files.