I stumbled across it while idly surfing the music part of the app store. Looked snazzy, only cost a dollar, powered by Reason. Worth 99 cents to me.
It is a fun, fun little app.
It's no DAW. It doesn't make any claims to be. What it does is give you some funky presets to play with, some basic mixing tools, and a quirky input method. Instead of tapping notes one by one, you simply set a key, range, basic rhythm, and interval, and you slide your finger across and around the keyboard. It will jump through your set intervals while playing the rhythm specified. All diatonic, no need to worry about wrong notes. It feels good and looks good.
You're not going to compose any masterpieces here, especially since the longest recordable length is 8 bars. However, I have found that messing around with Figure for three minutes is more productive than sitting at a keyboard for twenty. It's easy to get a sound in your head with, and, as I've said before, it's probably one of the best-looking apps I've ever seen.
Simple, fun, intuitive. If you have any kind of iProduct, pick this up for yourself.