This app was removed from the App Store.
Thumb Drummer - Virtual Drum Kit
iOS Universal Music
No recording, no midi, no frills, just simple virtual drums.
Pick from 10 kits to play:
Vintage 60s drum kit, hip hop kit, latin kit, dance kit, jazz kit, rock kit, vinyl scratch kit, and a few others.
Originally made to be played with your thumbs on the iPhone.
Even better on the iPad.