Mobile HD for iOS (iPod touch, iPhone & iPad) & FL Studio Mobile Android. iOS - From version 2.1 onward you can record multi-tracking - Up to 24 track simultaneous recording.
Android - As of version 2.0.1 FL Studio Mobile on Android ...
Studio Groove to control FL Studio
This currently isn't possible. MIDI Input was added to Groove Machine Mobile / FL Studio Groove from version 1.2. Once MIDI Output is added this may be possible.
Image-Line Support Team ...