# Pianoteq 9 vs Quartet 4

The clearest difference is price: Pianoteq 9 at Free against Quartet 4's $16.99. Pianoteq 9 also leads on rating (4.9 vs 4.7) and ratings volume (55 vs 18). Quartet 4's advantage is review sentiment (89% vs 72%). On update cadence, ads, in-app purchases and device support there is nothing between them.

Pianoteq 9 is free to download; Quartet 4 costs $16.99 up front. Pianoteq 9 sells 19 one-off in-app purchases and Quartet 4 sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Pianoteq 9 holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 55 and 18 respectively. Written reviews complicate that: 72% of Pianoteq 9's written reviews are positive against 89% of Quartet 4's, so the app with the better star average is not the one people write more warmly about.

Pianoteq 9 ships an update every 3 weeks, Quartet 4 monthly. The most recent releases landed on October 23, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Pianoteq 9 | Quartet 4 |
| --- | --- | --- |
| Price | **Free** | $16.99 |
| Rating | **[4.9 (55 ratings)](https://appshunter.io/ios/app/pianoteq-9/id6736754495/reviews)** | [4.7 (18 ratings)](https://appshunter.io/ios/app/quartet-4/id6740534761/reviews) |
| Number of ratings | **55** | 18 |
| Positive reviews | 72.2% of reviews | **89.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 68 MB | 528 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Modartt](https://appshunter.io/developer/1363148724) | [UK Music Apps Ltd](https://appshunter.io/developer/579320222) |

## What reviewers say

### Pianoteq 9

[App page](https://appshunter.io/ios/app/pianoteq-9/id6736754495)

This virtual instrument app uses advanced physical modeling to generate realistic sounds for pianos, electric pianos, harpsichords, and more. It offers compact file sizes and is trusted by renowned instrument makers. Unlock full instrument access with a license.

**Highlights:** Physical modeling sound generation, Realistic playability, Compact file size, Wide range of instruments, Plugin support for DAWs, New Syngular synthesizer

**Features:** Vision Pro support

**In-app purchases (19)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Use existing licence | Free | one-time |
| Upgrade to latest version | $29.00 | one-time |
| Classical Guitar | $49.99 | one-time |
| Steelpans | $49.99 | one-time |
| Grand Blüthner | $49.99 | one-time |
| Grand Petrof | $49.99 | one-time |
| Grand YC5 | $49.99 | one-time |
| Harp | $49.99 | one-time |
| Grand Steinway B | $49.99 | one-time |
| Grand Shigeru Kawai SK-EX | $49.99 | one-time |
| Grand Steingraeber | $49.99 | one-time |
| Grand Bösendorfer 280VC | $49.99 | one-time |
| Electric Pianos | $49.99 | one-time |
| Hohner Collection | $49.99 | one-time |
| Upright U4 | $49.99 | one-time |
| Syngular | $49.99 | one-time |
| Stage to Standard | $129.99 | one-time |
| Standard to Pro | $129.99 | one-time |
| Pianoteq STAGE | $139.00 | one-time |


### 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 Pianoteq 9 free?

Pianoteq 9 is free to download, with in-app purchases available.

### Is Quartet 4 free?

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

### Which has better reviews, Pianoteq 9 or Quartet 4?

Pianoteq 9 is rated higher. Pianoteq 9 averages 4.9 out of 5 from 55 ratings, while Quartet 4 averages 4.7 from 18 ratings.

### Do Pianoteq 9 or Quartet 4 have ads?

Neither Pianoteq 9 nor Quartet 4 shows ads.

### Which is updated more often, Pianoteq 9 or Quartet 4?

Pianoteq 9 ships an update every 3 weeks, and Quartet 4 monthly. Most recently, Pianoteq 9 was updated on October 23, 2026 and Quartet 4 on October 22, 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.*