MD-SQUARE is a landscape performance app that puts drum pads and a keyboard on one screen — inspired by compact MIDI controllers. DRUM PADS • 2×4 pad grid with Bank A/B • Multiple drum kits • Optional pad artwork KEYBOARD & SOUND • On-screen keyboard with octave shift • Multiple synth voices • Cutoff, resonance, attack, release, and reverb knobs • Pitch bend strip and mod control • Arpeggiator (ARP) • Dedicated keyboard reverb toggle SEQUENCER • Built-in beat patterns (2 / 4 / 8 / 16) • BPM, swing, and tap tempo • Step indicator while playing RECORD & MIDI • Record your performance and share takes • MIDI input support (keys + drum channel) Built for jamming, idea sketching, and controller-style play — all in landscape on iPhone.