# Theremin I/O vs neo Drone

The clearest difference is review sentiment: Theremin I/O at 77% against neo Drone's 0%. Theremin I/O also leads on iOS requirement (8.0 vs 10.0). neo Drone's advantage is in-app purchases (none vs 1). On price, update cadence, ads and monetization model there is nothing between them.

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

Theremin I/O ships an update every 24 months, neo Drone every 43 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Theremin I/O | neo Drone |
| --- | --- | --- |
| Price | $2.99 | $2.99 |
| Rating | **[4.0 (5 ratings)](https://appshunter.io/ios/app/theremin-io/id669456913/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | **76.9% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 24 months** | Every 43 months |
| Monetization | Paid | Paid |
| Size | 18 MB | 9 MB |
| Requires iOS | **8.0** | 10.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | +4 | 4+ |
| Developer | [FFFF00 Agents AB](https://appshunter.io/developer/288966262) | [Aleksandar Mlazev](https://appshunter.io/developer/1093798140) |

## 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 |


### neo Drone

[App page](https://appshunter.io/ios/app/neo-drone-virtual-theremin/id1314323489)

This music app uses your device's camera to track hand movements, allowing you to control a virtual synthesizer without touching the screen. Explore a 2.5-octave range with legato and staccato modes, and use the touch area as a kill switch for unique vocal synth sounds.

**Highlights:** Camera-controlled pitch, Touch-based kill switch, 2.5 octave tonal range, Adjustable light sensitivity, Core MIDI support, Legato and staccato modes

**Features:** 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 neo Drone free?

neo Drone costs $2.99, with no in-app purchases.

### Do Theremin I/O or neo Drone have ads?

Neither Theremin I/O nor neo Drone shows ads.

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

Theremin I/O ships an update every 24 months, and neo Drone every 43 months. Most recently, Theremin I/O was updated on November 6, 2026 and neo Drone on November 2, 2026.

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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.*