Novation have announced tight integration between the Ampify iOS Groovebox app and their Launchkey Mini, 25, 49 and 61 controllers.
You can hook up one of the Novation controllers listed above and use it to navigate and play the Groovebox app on iOS. The new features are as follows:
Play Melodies - Scale modes help you play in key
Tweak Synths - The knobs easily control the instrument shortcut controls
Play Beats - Coloured drumpads easily separate your kicks from snares
Perform - Pads Select tracks and mute channels
Sliders - Adjust channel volumes
Transport - Play/stop and scene up/down controls.
its got a bit of a Gadget vibe to it, which is another great music creation system for iOS.