Theremin I/O vs pocketOSC
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
pocketOSC
This versatile audio tool generates various waveforms like Sine, Square, Saw, and Noise. It includes an oscilloscope and controls for wave, frequency, and volume, functioning as a plug-in or standalone application.
- Stereo capable oscillator
- Oscilloscope display
- Waveform generation (Sine, Square, Saw, Noise)
- Frequency and Volume control
- VST3, AU, AUv3 support
- Standalone operation
- Resizable and automatable GUI
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pocketOSC is a macOS, Windows, and now iOS compatible stereo capable oscillator. Designed for VST3, AU, AUv3, and stand-alone use. Complete with oscilloscope and controllable Wave, Frequency, & Volume. Test all your gear with Sine, Square, Saw, and Noise, oscillators. Plug-in GUI resizable and automatable parameters designed to recall with your various sessions. *Stand-alone allows for external audio device.
Screenshots
Verdict
The clearest difference is rating: pocketOSC at 5.0 against Theremin I/O's 4.0. pocketOSC also leads on in-app purchases (none vs 1) and update cadence (every 12 months vs every 24 months). Theremin I/O's advantage is chart position (#187 vs unranked) and iOS requirement (8.0 vs 12.0). On ratings volume, ads, monetization model 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
Theremin I/O costs $2.99 and pocketOSC $0.99 up front. Theremin I/O sells 1 one-off in-app purchase. pocketOSC asks for nothing beyond the download.
pocketOSC holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 5 and 2 respectively.
Theremin I/O ships an update every 24 months, pocketOSC every 12 months. The most recent releases landed on October 12, 2026 and October 14, 2026 respectively.
| Parameter | Theremin I/O | pocketOSC |
|---|---|---|
| Price | $2.99 | $0.99 — better |
| Rating | 4.0 (5 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 76.9% of reviews | — |
| Number of ratings | 5 — better | 2 |
| Update frequency | Every 24 months | Every 12 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Best chart rank | #187 — better | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 18 MB | 30 MB |
| Age rating | +4 | 4+ |
| Developer | FFFF00 Agents AB | OSC Audio |
Customer experience
Theremin I/O
pocketOSC
In-app purchases
Theremin I/O
- Network MIDI$5.99
pocketOSC
No in-app purchases
