DigiDrummer by Magnus Larsson is – in my opinion – the best drum app for the iPhone. DigiDrummer Micro is its little brother. There is also a lite version of this app with only 1 drum set.

Micro has DigiDrummer’s great layout, almost zero latency, the ability to record one track and plpay along to to your iPod music.

It features 8 full drum sets.