# Quartet 1 vs Transposer Pro

The clearest difference is price: Transposer Pro at $0.99 against Quartet 1's $19.99. Transposer Pro also leads on in-app purchases (none vs 5). Quartet 1's advantage is update cadence (every 3 months vs every 11 months). On ads, chart position, device support and iOS requirement there is nothing between them.

Quartet 1 costs $19.99 and Transposer Pro $0.99 up front. Quartet 1 sells 5 one-off in-app purchases. Transposer Pro asks for nothing beyond the download.

Quartet 1 ships an update every 3 months, Transposer Pro every 11 months. The most recent releases landed on September 27, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Quartet 1 | Transposer Pro |
| --- | --- | --- |
| Price | $19.99 | **$0.99** |
| Rating | **[4.6 (112 ratings)](https://appshunter.io/ios/app/quartet-1/id1623038041/reviews)** | — |
| Number of ratings | **112** | — |
| Positive reviews | 83.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 11 months |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#83** | #194 |
| Size | 581 MB | 3 MB |
| Requires iOS | 16.6 | **16.3** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [UK Music Apps Ltd](https://appshunter.io/developer/579320222) | [Matt Welch](https://appshunter.io/developer/1693016625) |

## What reviewers say

### Quartet 1

[App page](https://appshunter.io/ios/app/quartet-1/id1623038041)

**Currently charting:** #83 Top Paid · Music (US App Store)

Practice and perform jazz standards with high-quality backing tracks. Mute your instrument, change keys, adjust tempo, and loop sections. Features animated chord diagrams and playlist creation for an enhanced musical experience.

**Highlights:** Live jazz standards backing tracks, Mute your instrument, Change key and tempo, Loop practice sections, Animated chord diagrams, Multi-app playlist creation, Multitrack export

**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 | $49.99 | one-time |

**What reviewers like**

- 🎶 Excellent sound quality
- 🎸 Real musicians' performance
- 👍 Great value for money
- 🚀 Flexible tempo and key changes
- 🎵 Inspiring for practice

**What reviewers complain about**

- 🐛 Clunky UI
- 😵 Fiddly tempo adjustment
- 🎚️ Limited mixer options
- 🎛️ No individual instrument volume control
- 🎚️ Sound quality degradation with tempo/key changes

**Reported bugs**

- Playlists disappear
- Playlists replaced by old ones
- Looping parts not saved
- Edits wiped out
- Cannot put song into desired key

**Requested features**

- Dark mode option
- Tap tempo button
- Ability to create own charts
- Export to WAV and MP3
- Export chord chart in different ways


### Transposer Pro

[App page](https://appshunter.io/ios/app/transposer-pro/id6479720686)

**Currently charting:** #194 Top Paid · Music (US App Store)

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

**In-app purchases:** none


## Frequently asked questions

### Is Quartet 1 free?

Quartet 1 costs $19.99, and also offers in-app purchases.

### Is Transposer Pro free?

Transposer Pro costs $0.99, with no in-app purchases.

### Do Quartet 1 or Transposer Pro have ads?

Neither Quartet 1 nor Transposer Pro shows ads.

### Which is updated more often, Quartet 1 or Transposer Pro?

Quartet 1 ships an update every 3 months, and Transposer Pro every 11 months. Most recently, Quartet 1 was updated on September 27, 2026 and Transposer Pro on September 22, 2026.

### Which is more popular, Quartet 1 or Transposer Pro?

Quartet 1 currently peaks at #83 in the App Store charts, and Transposer Pro at #194. Chart position reflects recent download velocity rather than total install base.

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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.*