The Amazing Slow-Downer
This app allows you to slow down a piece of music to whatever tempo you want without distorting pitch! The free version works perfectly well. Go to your app store and type in "The Amazing Slow Downer".
Pitch- my new favorite tuning app.
"Frozen Ape" Tempo- great app I've been using for a long time. Allows you to do subdivisions and accent specific beats, change time signature. Keeps running in background if you switch to your tuning app as well.
Pulse- Free- easy to use. Allows you to sync your metronomes with your friends nearby. Great for quartet practice!