🌸Spring 2026 Pebble App Contest — View the entries!

Theremin

SIDEffect's

Watchapp
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Description

Play a theremin on your wrist: raise your hand for pitch, twist it for volume.

Theremin turns the Pebble Time 2 into an instrument you play without
touching it. Just like the original, the position of your hand shapes the
sound: raising and lowering your hand changes the pitch, twisting your wrist
controls the volume. The tone is synthesized in real time and played through
the watch's speaker.

Features

- Four waveforms: sine, triangle, square, sawtooth
- Vibrato in three depths or driven by the tremble of your hand
- Reverb in three room sizes
- Up to four octaves of range, selectable lowest note
- Snap to scales: chromatic, major, minor, pentatonic, or play continuously like a real theremin
- Freely assignable control axes: lift, roll or compass, each invertible
- Adjustable sensitivity, portamento and volume
- Automatic calibration on launch: hold the watch still for a second and you're set
- Live readout of frequency and note name, with the animated waveform in the background
- Noise gate switches the speaker off during silence
- Every setting available on the watch or conveniently in the Pebble phone app
- Seven languages (EN, DE, FR, ES, IT, PT, NL)

Controls

- SELECT: sound on or off
- UP and DOWN: waveform
- Long SELECT: settings
- Long UP: recalibrate the neutral position

Tip: Keep the watch still for a moment when the app starts; that pose becomes
the middle of the pitch range. Tilted towards you is loud, tilted away silent.

Pebble Time 2 only (needs the speaker). Compass mode is experimental.

Vibe coded from start to store. That is the only reason it exists alongside a full time job.

The app is free and has no ads. If you enjoy it, a coffee is much
appreciated: https://buymeacoffee.com/SIDEffects
  • DeveloperSIDEffect's
  • CategoryTools & Utilities
  • PlatformsTime 2
  • Updated2026-09-11
  • Version1.2