# Mass vs midiOS

The clearest difference is price: Mass at $9.99 against midiOS's $24.99. Mass also leads on iOS requirement (17.0 vs 26.0). midiOS's advantage is update cadence (every 3 days vs every 4 months). On ads, in-app purchases and device support there is nothing between them.

Mass costs $9.99 and midiOS $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mass ships an update every 4 months, midiOS every 3 days. The most recent releases landed on October 15, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Mass | midiOS |
| --- | --- | --- |
| Price | **$9.99** | $24.99 |
| Rating | **[5.0 (11 ratings)](https://appshunter.io/ios/app/mass-midi-generator/id6498471263/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Monetization | Paid | — |
| Size | 10 MB | 341 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Usable Creations](https://appshunter.io/developer/1718600235) | [jason merrill](https://appshunter.io/developer/1829076241) |

## What reviewers say

### Mass

[App page](https://appshunter.io/ios/app/mass-midi-generator/id6498471263)

This app is a physics-based MIDI generator that allows musicians to create complex generative sequences, organic modulations, and explore boundless musical experimentation. It offers a powerful toolkit for creative control and can be used as a standalone application or an AUv3 plugin.

**Highlights:** Generative Sequences, Living Modulations, Euclidean Pattern Sequencing, Flexible MIDI CC, Physics-Based Animation, Standalone & AUv3 Plugin, MIDI Sync, iCloud Sync

**Features:** Vision Pro support

**In-app purchases:** none


### midiOS

[App page](https://appshunter.io/ios/app/midios/id6755208218)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mass free?

Mass costs $9.99, with no in-app purchases.

### Is midiOS free?

midiOS costs $24.99, with no in-app purchases.

### Do Mass or midiOS have ads?

Neither Mass nor midiOS shows ads.

### Which is updated more often, Mass or midiOS?

Mass ships an update every 4 months, and midiOS every 3 days. Most recently, Mass was updated on October 15, 2026 and midiOS on October 9, 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.*