Theremin I/O vs Wave Organ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Theremin I/O
Transform your iPhone into a touchless musical instrument using your camera and flash. Control sound generation by hand proximity, with options for scales, sound presets, and effects. An in-app purchase enables MIDI controller functionality.
- Touchless instrument control via camera
- Adjustable scales and harmony quantization
- Multiple sound presets with effects
- MIDI controller functionality (in-app purchase)
- Interactive tutorial overlay
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Play with light – Theremin I/O turns your iPhone into a touchless music instrument. It uses your camera and flash to measure the distance to your hand, this signal is then processed by a synthesizer to generate a tone. Features: • Old-school synthesizer • Constrain input to scales (harmony quantization) • 8 sound presets with effect controls • 50+ scale presets • Use as a MIDI controller (requires in-app purchase) • Learn fast with the tutorial overlay For more information visit http://theremin.io
Wave Organ
This app emulates a theremin, allowing you to control tone with one hand and volume with the other by hovering over your phone's screen. Experience unique musical expression through intuitive gesture control.
- Theremin emulation
- Tone control via hand gestures
- Volume control via hand gestures
- Intuitive interface
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It's a theremin emulator. One hand floating above your phone, controls tone. The other, controls the output volume.
Screenshots
Verdict
The clearest difference is price: Wave Organ at Free against Theremin I/O's $2.99. Wave Organ also leads on rating (5.0 vs 4.0) and in-app purchases (none vs 1). Theremin I/O's advantage is ratings volume (5 vs 1) and iOS requirement (8.0 vs 18.1). On ads and device support 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
Wave Organ is free to download; Theremin I/O costs $2.99 up front. Theremin I/O sells 1 one-off in-app purchase. Wave Organ asks for nothing beyond the download.
Wave Organ holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Theremin I/O has 5 ratings behind it against 1, so its average is the more settled of the two.
Theremin I/O ships an update every 24 months, Wave Organ every 2 months. The most recent releases landed on October 26, 2026 and October 8, 2026 respectively.
| Parameter | Theremin I/O | Wave Organ |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.0 (5 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 76.9% of reviews | — |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 24 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 18.1 |
| Further details — not scored | ||
| Size | 18 MB | 2 MB |
| Age rating | +4 | 4+ |
| Developer | FFFF00 Agents AB | Raemond Bergstrom-Wood |
Customer experience
Theremin I/O
Wave Organ
In-app purchases
Theremin I/O
- Network MIDI$5.99
Wave Organ
No in-app purchases
