Sonobender vs Syntheremin
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sonobender
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Sonobender is an innovative music app that lets you play theremin sounds using hand gestures. Use your camera to track hand movements and control sound intuitively: • Right hand position → Pitch control • Left hand pinch gesture → Volume control Key Features: • Real-time hand tracking for theremin performance • Various waveform sounds (sine, square, sawtooth, and more) • Beautiful Aurora visual backgrounds • Daily check-in rewards for new sounds • Musical note display for learning Sound Collection: • Classic theremin sounds • Synth leads • Daily opportunities to earn new sounds Experience the mystical theremin sound with just your iPhone/iPad - no additional equipment needed!
Syntheremin
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Play the air. Syntheremin Instrument turns the space in front of your iPhone into a continuous musical instrument. Move both hands through the camera view to perform without touching the screen. PLAY CONTINUOUS PITCH Move your dominant hand horizontally through the note field. Raise or lower it to keep gliding smoothly across octaves—without the steps of a keyboard. CONDUCT THE VOLUME Raise your other hand to swell and lower it to quiet. Keep it still for a steady level, or close your fist for an immediate mute. SCULPT THE SOUND Roll your pitch wrist to sweep an analog-style filter. Roll your volume wrist to move from dry and focused to wide with a short echo. BUILD HARMONIC THREADS Touch matching fingertips to layer an octave, scale third, scale fifth, or high shimmer. Stretch the glowing connections to intensify them, then pinch a connected finger to release its voice. MADE TO BE PLAYED • Classic, Choir, and Glass synth characters • Scale-based note gravity that helps intonation while preserving glides • Live pitch lanes, note readout, and tuner • Role-colored hand tracking that shows what the instrument hears • Right- and left-handed layouts • No account, ads, or microphone access PRIVATE CAMERA PROCESSING Camera frames and hand landmarks are processed on the iPhone and are never saved or uploaded. The bundled Google MediaPipe SDK sends limited usage and performance metrics to Google; details are available in the in-app Privacy screen and privacy policy. REQUIREMENTS Syntheremin Instrument requires an iPhone with a front TrueDepth camera—the hardware used for Face ID. For the most responsive playing experience, use the built-in speaker, wired audio, or low-latency headphones.
Screenshots
Verdict
The clearest difference is ads: Syntheremin at none against Sonobender's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Sonobender | Syntheremin |
|---|---|---|
| Price | Free | Free |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 21 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Ouimin Lee | XYK LLC |
In-app purchases
Sonobender
No in-app purchases
Syntheremin
No in-app purchases









