Apple has released a big update to GarageBand for iOS that brings support for Audiobus, an iOS app that routes audio between other apps. This means that GarageBand can record and work with other music creation apps from the App Store. You could make a beat in DM1 and bring it right into a multi-track GarageBand project, for instance.
In this latest version of GarageBand you can “turn off grid snapping to get finer control over region and note editing.” A feedback issue has also been resolved.
GarageBand costs $5 in the App Store.
Source: App Store.