Ctrl for iPad is described as 'An application designed to create highly custom interfaces for live performances or installations featuring in app editing, multi protocol support, multiple commands per button, (MIDI, OSC, HTTP, UDP, TCP & sACN)' and is a music production app in the audio & music category. There are more than 10 alternatives to Ctrl for iPad for a variety of platforms, including Android Tablet, Android, iPhone, iPad and Google Chrome apps. The best Ctrl for iPad alternative is Holon.ist. It's not free, so if you're looking for a free alternative, you could try Sensors2OSC or Open Stage Control. Other great apps like Ctrl for iPad are TouchOSC, Surface Builder, Control (OSC + MIDI) and andOSC.