TonePad
Tonepad provides ready-to-go effects and amplifier for the do-it-yourself musician. Create tunes from your phone and share them.
Whether you have tried composing before or not, TonePad from LoftLab is a free and simple music application that will get you tinkering tunes in no time.
Simply press buttons in a random fashion and create a synthesised tune - whether it be any good or not, is up to.