# QSO vs MIDI Keyboard

The clearest difference is in-app purchases: QSO at none against MIDI Keyboard's 2. QSO also leads on iOS requirement (9.0 vs 17.0). MIDI Keyboard's advantage is device support. On price there is nothing between them.

Both are free to download. MIDI Keyboard sells 2 in-app purchases, starting at $4.99 per 7 days. QSO asks for nothing beyond the download.

## The numbers

| Metric | QSO | MIDI Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Size | 19 MB | 18 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | — | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [深圳市集智电子有限公司](https://appshunter.io/developer/1655111205) | [明航 李](https://appshunter.io/developer/1823569127) |

## What reviewers say

### QSO

[App page](https://appshunter.io/ios/app/qso/id6474469549)

**In-app purchases:** none


### MIDI Keyboard

[App page](https://appshunter.io/ios/app/midi-keyboard-taptave/id6801443132)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited MIDI Access | $4.99 | per 7 days |
| Unlimited MIDI Access | $24.99 | per year |


## Frequently asked questions

### Is QSO free?

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

### Is MIDI Keyboard free?

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

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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.*