GridInstrument allows you to transform your iPhone into a musical instrument with a unique grid layout for notes. It offers Launchpad integration, enabling you to connect your Launchpad device and play seamlessly. You can change octaves, keys, and select from over 20 musical modes like Major, Minor, and Dorian.

Additionally, GridInstrument provides flexibility with three grid layouts to choose from, including "Diatonic," "Chromatic/4ths String Layout," and "Drum rack." You can also adjust row note offset/overlap settings. With Core MIDI out support, you can control other instruments, utilize Audiobus 3 MIDI support, and input MIDI notes to display triggered notes on your grid.