If you want instant acoustic drums suitable for your ‘rock’ (use that in a fairly broad sense of the word to cover various musical styles) then Rock Drum Machine by developer Luis Martinez is a very good option.
The app provides a compact, streamlined, but very useable universal (iPad and iPhone) drum machine format but with sounds and styles aimed very much and the rock genre rather then electronic styles. Since my original review, Luis has continued to update the app and add all sorts of useful extra features including Song Mode and extra fill/crash cymbal options. And, as I mentioned back in October, v.4 added the Live Pads and Ableton Link support that Luis has gradually been adding to all his genre-based drum apps. Anyway, as a means of generating some great acoustic drum parts in an instant, Rock Drum Machine is hard to beat (doh!)
A further update to Rock Drum Machine 4 arrived on the App Store while I was on my short period of ‘leave’. This was very much in the ‘maintenance’ category – some minor improvements and bug-fixes – but it is always welcome to see a favourite app updated on a regular basis as a sign of ongoing activity. While Rock Drum machine is in the same general category as apps such as DrumPerfect Pro is is perhaps closer in concept to something like Drum Session, where the focus is on using preset kits, an impressive collection of built-in patterns (although you can easily create your own) and a very easy-to-use song construction system. In this regard, Rock Drum machine does make it very easy to get a complete drum track together in double-quick time.
If you need an easy-to-use ‘drum buddy’ app to help realise your guitar-based song ideas, Rock Drum Machine is about as easy as it gets and most certainly worth the entrance fee. With both Audiobus and IAA support included, a universal format and a pretty modest 160MB footprint, you can read the original Rock Drum Machine review here… but the app comes highly recommended as an easy-to-use means of generating acoustic drum parts. And if you like this one, then check out Funk Drummer, Brazilian Drum Machine, Soft Drummer and Afro Latin Drum Machine while you are at it :-)