Phone Theremin

Phone Theremin transforms your touchscreen into a fully expressive theremin. Two-zone control lets you play pitch and vibrato simultaneously.

Turn your iPhone into a real theremin — the haunting electronic instrument that plays without being touched.

Phone Theremin uses your screen as a two-zone controller. Touch the left panel to activate sound and slide up and down to control volume. Use your right hand on the pitch zone — slide up for higher notes, down for lower. Move horizontally to add vibrato depth. Lift either hand to silence it, just like the real instrument.

FEATURES · Two-octave range — C3 to C5 (130–523 Hz) · Smooth portamento pitch gliding — no stepping between notes · Vibrato control — 0 to 40 cents depth, 5.4 Hz rate · Warm reverb for that classic theremin sound · Record up to 30 seconds and save as a WAV file · Share recordings via iOS Share Sheet · Works offline — no internet required · No ads, no subscriptions, no sign-in