# Theremin I/O vs Gankogui

The clearest difference is rating: Gankogui at 5.0 against Theremin I/O's 4.0. Gankogui also leads on in-app purchases (none vs 1) and review sentiment (100% vs 77%). Theremin I/O's advantage is price ($2.99 vs $4.99) and iOS requirement (8.0 vs 17.0). On ratings volume, ads, monetization model and device support there is nothing between them.

Theremin I/O costs $2.99 and Gankogui $4.99 up front. Theremin I/O sells 1 one-off in-app purchase. Gankogui asks for nothing beyond the download.

Gankogui holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 5 and 7 respectively. Written reviews point the same way: 77% of Theremin I/O's written reviews are positive against 100% of Gankogui's.

## The numbers

| Metric | Theremin I/O | Gankogui |
| --- | --- | --- |
| Price | **$2.99** | $4.99 |
| Rating | [4.0 (5 ratings)](https://appshunter.io/ios/app/theremin-io/id669456913/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/gankogui/id6758734130/reviews)** |
| Number of ratings | 5 | **7** |
| Positive reviews | 76.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 24 months | — |
| Monetization | Paid | Paid |
| Size | 18 MB | 15 MB |
| Requires iOS | **8.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [FFFF00 Agents AB](https://appshunter.io/developer/288966262) | [BENJAMIN STEELE PAULDING](https://appshunter.io/developer/1874667231) |

## What reviewers say

### Theremin I/O

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

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 |


### Gankogui

[App page](https://appshunter.io/ios/app/gankogui/id6758734130)

This app provides a library of Ghanaian timeline rhythms with authentic sound samples and adjustable tempo. It serves as a practice tool for musicians and dancers of West African music, offering an alternative to traditional metronomes.

**Highlights:** Library of Ghanaian timeline rhythms, Authentic sound samples, Flexible tempo playback, Asante and Ewe rhythm categories, Practice tool for musicians and dancers, Alternative to metronome

**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 Gankogui free?

Gankogui costs $4.99, with no in-app purchases.

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

Gankogui is rated higher. Theremin I/O averages 4.0 out of 5 from 5 ratings, while Gankogui averages 5.0 from 7 ratings.

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

Neither Theremin I/O nor Gankogui shows ads.

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