
Index Theremin
Make music with your hands
0 ratings
Free
Rating summary
About
Theremin is a tiny instrument you play with thin air.
Hold up one finger in front of your phone: raise it for higher notes, move it sideways to play louder. That's it, you're playing. Make a fist to stop.
A SOUND FOR EVERY MOOD
• Theremin: the classic eerie wail
• Dusk: a dark, slow, melancholic synth
• Aura: an airy, voice-like pad
• Glass: a soft, bell-like shimmer
• 8-Bit: a video-game square wave
ALWAYS IN TUNE
Auto-Tune snaps you to a scale (major, minor, pentatonic or every note) in any key. Hard for the robot effect, Smooth for a gentle glide.
PLAY A DUET
Turn on Duet Mode and each hand becomes its own instrument, with its own sound and settings.
MORE TO PLAY WITH
• Reverb and Pulse effects
• Volume and octave for each hand
• Make a fist to mute without hiding your hand
• Portrait or landscape, iPhone and iPad
PRIVATE BY DESIGN
Hand tracking happens entirely on your device. Nothing is recorded, uploaded or collected.
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What's New in Index Theremin
1.0
October 14, 2026




