Finally! There are lots of apps out there that can slow down or change the pitch of an audio file, but I’ve had a hell of a time finding one that can actually save the altered file. This Android app does it! As a teacher, I often provide my students with slower or pitch-shifted versions of tunes to practice. Previously, I had to give them a web address, then tell them to check it the next day after I’d gone home and edited whatever song they were working on. Now I can alter the song during the lesson and upload it before they even leave!
Very happy with this app. https://play.google.com/store/apps/details?id=com.teapps.musicspeedchanger