# Theremin I/O vs pocketOSC

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.

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.

## The numbers

| Metric | Theremin I/O | pocketOSC |
| --- | --- | --- |
| Price | $2.99 | **$0.99** |
| Rating | [4.0 (5 ratings)](https://appshunter.io/ios/app/theremin-io/id669456913/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pocketosc/id6450972460/reviews)** |
| Number of ratings | **5** | 2 |
| Positive reviews | 76.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 12 months** |
| Monetization | Paid | Paid |
| Best chart rank | **#187** | — |
| Size | 18 MB | 30 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [FFFF00 Agents AB](https://appshunter.io/developer/288966262) | [OSC Audio](https://appshunter.io/developer/1693533681) |

## What reviewers say

### Theremin I/O

[App page](https://appshunter.io/ios/app/theremin-io/id669456913)

**Currently charting:** #187 Top Paid · Music (US App Store)

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.

**Highlights:** Touchless instrument control via camera, Adjustable scales and harmony quantization, Multiple sound presets with effects, MIDI controller functionality (in-app purchase), Interactive tutorial overlay

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Network MIDI | $5.99 | one-time |


### pocketOSC

[App page](https://appshunter.io/ios/app/pocketosc/id6450972460)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Theremin I/O free?

Theremin I/O costs $2.99, and also offers in-app purchases.

### Is pocketOSC free?

pocketOSC costs $0.99, with no in-app purchases.

### Which has better reviews, Theremin I/O or pocketOSC?

pocketOSC is rated higher. Theremin I/O averages 4.0 out of 5 from 5 ratings, while pocketOSC averages 5.0 from 2 ratings.

### Do Theremin I/O or pocketOSC have ads?

Neither Theremin I/O nor pocketOSC shows ads.

### Which is updated more often, Theremin I/O or pocketOSC?

Theremin I/O ships an update every 24 months, and pocketOSC every 12 months. Most recently, Theremin I/O was updated on October 12, 2026 and pocketOSC on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*