Great little app.
This is a great little app with the best features if could find. However the syncing of the tracks are a little off. I believe this is due to the phone processors just not being up to speed. But if you want to record 4 different tracks while playing guitar to a recorded drum solo or in my case ukulele as well. Its fine as long as you dont try to sync into one track. Just save as separate tracks. Has ability to change Db on mic with headphones plugged in so you can listen and play without the mic picking up the sound of the track your playing to. Its really very nicely done.
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Multi Track Song Recorder