# Mass vs 4i Player

The clearest difference is price: 4i Player at Free against Mass's $9.99. 4i Player also leads on update cadence (every 9 days vs every 4 months) and iOS requirement (15.1 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

4i Player is free to download; Mass costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Mass ships an update every 4 months, 4i Player every 9 days. The most recent releases landed on October 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Mass | 4i Player |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| 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 9 days** |
| Monetization | Paid | — |
| Size | 10 MB | 37 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Usable Creations](https://appshunter.io/developer/1718600235) | [Niels Brinch](https://appshunter.io/developer/1437538252) |

## 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


### 4i Player

[App page](https://appshunter.io/ios/app/4i-player/id6785224189)

**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 4i Player free?

4i Player is free to download, with no in-app purchases.

### Do Mass or 4i Player have ads?

Neither Mass nor 4i Player shows ads.

### Which is updated more often, Mass or 4i Player?

Mass ships an update every 4 months, and 4i Player every 9 days. Most recently, Mass was updated on October 24, 2026 and 4i Player on October 16, 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.*