# iGigBook Mobile vs Quartet 4

The clearest difference is review sentiment: Quartet 4 at 89% against iGigBook Mobile's 35%. Quartet 4 also leads on rating (4.7 vs 4.2). iGigBook Mobile's advantage is price ($9.99 vs $16.99) and chart position (#197 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

iGigBook Mobile costs $9.99 and Quartet 4 $16.99 up front. iGigBook Mobile sells 1 one-off in-app purchase and Quartet 4 sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Quartet 4 holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 68 and 20 respectively. Written reviews point the same way: 35% of iGigBook Mobile's written reviews are positive against 89% of Quartet 4's.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | iGigBook Mobile | Quartet 4 |
| --- | --- | --- |
| Price | **$9.99** | $16.99 |
| Rating | [4.2 (68 ratings)](https://appshunter.io/ios/app/igigbook-mobile-pocket-size/id392992367/reviews) | **[4.7 (20 ratings)](https://appshunter.io/ios/app/quartet-4/id6740534761/reviews)** |
| Number of ratings | **68** | 20 |
| Positive reviews | 34.9% of reviews | **89.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | **#197** | — |
| Size | 14 MB | 528 MB |
| Requires iOS | **11.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Black & White Software LLC](https://appshunter.io/developer/392992370) | [UK Music Apps Ltd](https://appshunter.io/developer/579320222) |

## What reviewers say

### iGigBook Mobile

[App page](https://appshunter.io/ios/app/igigbook-mobile-pocket-size/id392992367)

**Currently charting:** #197 Top Paid · Music (US App Store)

Manage your sheet music collection on your iPhone. Quickly search for songs, view melodies, chords, and lyrics, and transpose chord charts. Easily share set lists and PDFs with band members.

**Highlights:** Song search by title or composer, View melody, chords, and lyrics, Transposable chord charts for Jazz standards, Load PDF books via iTunes, email, or web, Email set lists with PDF attachments, Indexes for over 70 fake and real books

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Transposable Jazz Chord Charts | Free | one-time |

**What reviewers like**

- 👍 Organizes PDF files well
- 👍 Great for gigging musicians
- 👍 Useful for practice
- 👍 Transposable chord charts are great
- 👍 Indexes PDF fake books

**What reviewers complain about**

- 😞 No music content included
- 😞 Misleading app description
- 😞 Waste of money
- 😞 Difficult to set up
- 😞 Not intuitive

**Reported bugs**

- App doesn't work
- PDFs are grayed out
- Indexing doesn't always work
- Cannot access second page of a tune
- Song search has issues with multiple finds

**Requested features**

- Search function in unindexed scores
- Dark mode option
- Two-page view
- Support for other musical styles
- Ability to rotate pages


### 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 iGigBook Mobile free?

iGigBook Mobile costs $9.99, and also offers in-app purchases.

### Is Quartet 4 free?

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

### Which has better reviews, iGigBook Mobile or Quartet 4?

Quartet 4 is rated higher. iGigBook Mobile averages 4.2 out of 5 from 68 ratings, while Quartet 4 averages 4.7 from 20 ratings.

### Do iGigBook Mobile or Quartet 4 have ads?

Neither iGigBook Mobile nor Quartet 4 shows ads.

### Which is updated more often, iGigBook Mobile or Quartet 4?

iGigBook Mobile ships an update monthly, and Quartet 4 monthly. Most recently, iGigBook Mobile was updated on October 27, 2026 and Quartet 4 on October 28, 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.*