Keyboard Arp & Drum Pad is a Core MIDI iPad application that transmits notes to external MIDI instruments and includes a keyboard, arpeggiator and assignable drum pads. Please use MIDI instruments ( YAMAHA MOTIF XF and etc... ) with this app.
You can play the built-in keyboard, trigger arps and play various patterns of instruments such as drum, keyboard, and guitar. Also the drum pads lets you play drum phrases or assign the multiple notes on one pad and play chords. You can set the Keyboard Arp & Drum Pad to different channels so you can play drum beats and pad chords along with the sequence phrases