I was hesitant to buy this because it looked basic and is a few years old but this app works perfectly. The interface is very simple to use. I use it for practicing guitar songs. I load the mp3 onto my ipad and then can pull it into this app and change the pitch or speed up/slow down. I am learning some an halen tunes that are in D# but want to play them in standard tuning, so i just bump them up 1 semitone with this app and the sound perfect. This is like an old tascam trainer i used to have that cost a fortune, but this app works better, does more and costs very little. Every guitar player should buy this app.
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