# MOJOcontrol vs Quartet 4

The clearest difference is price: MOJOcontrol at Free against Quartet 4's $16.99. MOJOcontrol also leads on in-app purchases (none vs 5) and iOS requirement (10.0 vs 16.6). Quartet 4's advantage is update cadence (monthly vs every 56 months). On ads and device support there is nothing between them.

MOJOcontrol is free to download; Quartet 4 costs $16.99 up front. Quartet 4 sells 5 one-off in-app purchases. MOJOcontrol asks for nothing beyond the download.

MOJOcontrol ships an update every 56 months, Quartet 4 monthly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | MOJOcontrol | Quartet 4 |
| --- | --- | --- |
| Price | **Free** | $16.99 |
| Rating | — | **[4.7 (19 ratings)](https://appshunter.io/ios/app/quartet-4/id6740534761/reviews)** |
| Number of ratings | — | **19** |
| Positive reviews | — | 89.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 56 months | **Monthly** |
| Monetization | — | Paid |
| Size | 87 MB | 528 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [HIT Music](https://appshunter.io/developer/1438615693) | [UK Music Apps Ltd](https://appshunter.io/developer/579320222) |

## What reviewers say

### MOJOcontrol

[App page](https://appshunter.io/ios/app/mojocontrol/id1560279106)

**Features:** macOS Compatibility

**In-app purchases:** none


### Quartet 4

[App page](https://appshunter.io/ios/app/quartet-4/id6740534761)

Practice and perform jazz standards with high-quality backing tracks. Mute your instrument, change keys, adjust tempo, and loop sections for focused practice. Features animated chord diagrams and royalty-free multitrack exports for further creative use.

**Highlights:** Live jazz backing tracks, Mute your instrument, Change key and tempo, Looping for practice, Animated chord diagrams, Multitrack export, Playlist creation

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade song | $0.99 | one-time |
| Buy 10 tokens | $8.99 | one-time |
| Buy 20 tokens | $14.99 | one-time |
| Buy 50 tokens | $22.99 | one-time |
| Upgrade all songs | $39.99 | one-time |

**What reviewers like**

- 👍 Superb interface
- 🎨 Accurately labels tracks by style
- 🎶 Live instrument recordings
- 🔀 Ability to separate and send tracks
- 🎨 High-quality presentation and performance

**Requested features**

- More guitar in rhythm section for future volumes


## Frequently asked questions

### Is MOJOcontrol free?

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

### Is Quartet 4 free?

Quartet 4 costs $16.99, and also offers in-app purchases.

### Do MOJOcontrol or Quartet 4 have ads?

Neither MOJOcontrol nor Quartet 4 shows ads.

### Which is updated more often, MOJOcontrol or Quartet 4?

MOJOcontrol ships an update every 56 months, and Quartet 4 monthly. Most recently, MOJOcontrol was updated on October 25, 2026 and Quartet 4 on October 24, 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.*