# SBL Groove Trainer vs Quartet 4

The clearest difference is price: SBL Groove Trainer at Free against Quartet 4's $16.99. SBL Groove Trainer also leads on in-app purchases (none vs 5) and ratings volume (154 vs 20). Quartet 4's advantage is update cadence (monthly vs every 5 months). On rating, review sentiment, ads and device support there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.8 for SBL Groove Trainer against 4.7 for Quartet 4. That said, the two scores are not equally well evidenced: SBL Groove Trainer has 154 ratings behind it against 20, so its average is the more settled of the two. Written reviews are what separate them: 94% of SBL Groove Trainer's written reviews are positive against 89% of Quartet 4's.

SBL Groove Trainer ships an update every 5 months, Quartet 4 monthly. The most recent releases landed on October 22, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | SBL Groove Trainer | Quartet 4 |
| --- | --- | --- |
| Price | **Free** | $16.99 |
| Rating | **[4.8 (154 ratings)](https://appshunter.io/ios/app/sbl-groove-trainer/id1571452765/reviews)** | [4.7 (20 ratings)](https://appshunter.io/ios/app/quartet-4/id6740534761/reviews) |
| Number of ratings | **154** | 20 |
| Positive reviews | **93.6% of reviews** | 89.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | **Free** | Paid |
| Size | 286 MB | 528 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Devine Music Limited](https://appshunter.io/developer/1571452767) | [UK Music Apps Ltd](https://appshunter.io/developer/579320222) |

## What reviewers say

### SBL Groove Trainer

[App page](https://appshunter.io/ios/app/sbl-groove-trainer/id1571452765)

This app is a comprehensive practice toolkit for bass players. It offers a metronome, tuner, beat trainer, and a drum looper featuring live samples from professional drummers. Enhance your bass playing skills with realistic jamming and practice tools.

**Highlights:** Metronome, Precision tuner, Beat trainer, Drum looper with live samples, Practice with real musicians, Jam with famous drummers

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Excellent practice tool
- 👍 Great variety of drum loops
- 👍 Useful metronome and tuner features
- 👍 Convenient all-in-one app
- 👍 Impressive functionality

**What reviewers complain about**

- 🐛 Occasional crashes or glitches
- 🐛 Compatibility issues on certain devices
- 🔋 Drains battery quickly
- 👎 Lack of Bluetooth support

**Reported bugs**

- Grooves not loading after iOS update
- Drone feature not working properly
- Drum beats not loading on certain devices

**Requested features**

- Add visual tempo display
- Include reggae and other genre-specific beats
- Implement count-in feature
- Add lights to indicate each beat
- Integrate loop recording functionality


### 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 SBL Groove Trainer free?

SBL Groove Trainer is free to download, with no in-app purchases.

### Is Quartet 4 free?

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

### Which has better reviews, SBL Groove Trainer or Quartet 4?

SBL Groove Trainer is rated higher. SBL Groove Trainer averages 4.8 out of 5 from 154 ratings, while Quartet 4 averages 4.7 from 20 ratings.

### Do SBL Groove Trainer or Quartet 4 have ads?

Neither SBL Groove Trainer nor Quartet 4 shows ads.

### Which is updated more often, SBL Groove Trainer or Quartet 4?

SBL Groove Trainer ships an update every 5 months, and Quartet 4 monthly. Most recently, SBL Groove Trainer was updated on October 22, 2026 and Quartet 4 on October 26, 2026.

---

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