# MultiTuneKeys vs 24

The clearest difference is in-app purchases: 24 at none against MultiTuneKeys's 1. 24 also leads on ads (none vs shown) and update cadence (daily vs every 9 days). On price, device support and iOS requirement there is nothing between them.

Both are free to download. MultiTuneKeys sells 1 one-off in-app purchase. 24 asks for nothing beyond the download.

MultiTuneKeys ships an update every 9 days, 24 daily. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | MultiTuneKeys | 24 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (5 ratings)](https://appshunter.io/ios/app/24-tet-keys-microtonal-midi/id6789963675/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Daily** |
| Monetization | — | Free |
| Size | 6 MB | 14 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Yasuhiro Misawa](https://appshunter.io/developer/1892754235) | [Maxim Oransky](https://appshunter.io/developer/1639941241) |

## What reviewers say

### MultiTuneKeys

[App page](https://appshunter.io/ios/app/multitunekeys/id6764493629)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### 24

[App page](https://appshunter.io/ios/app/24-tet-keys-microtonal-midi/id6789963675)

Explore microtonal music with a virtual keyboard that plays notes between standard semitones. Hear quarter tones instantly, send them as MIDI to your DAW, and discover unique keyboard layouts that morph into each other.

**Highlights:** Microtonal keyboard for quarter tones, MIDI output to DAWs, Morphing keyboard layouts, Polyphonic and mono MIDI modes, Visual representation of 24-TET, On-device sound playback

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

**In-app purchases:** none


## Frequently asked questions

### Is MultiTuneKeys free?

MultiTuneKeys is free to download, with in-app purchases available.

### Is 24 free?

24 is free to download, with no in-app purchases.

### Do MultiTuneKeys or 24 have ads?

MultiTuneKeys shows ads; 24 does not.

### Which is updated more often, MultiTuneKeys or 24?

MultiTuneKeys ships an update every 9 days, and 24 daily. Most recently, MultiTuneKeys was updated on October 24, 2026 and 24 on October 31, 2026.

---

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