SidTracker64 is an app that allows you to create chiptune music right from your Ipad. Using emulators of the SID sound chip from Commodore 64 this tracker style sequencer comes pre set with several songs included and tools to create your own.
SidTracker64 can be purchased from the Apple App Store for £9.99/$12.99
You can follow Elly on twitter and check out her site Philly Geek Girl for more geeky goodness!