# StringMaster Pro vs Scaler 3

The clearest difference is update cadence: Scaler 3 at fortnightly against StringMaster Pro's every 3 months. Scaler 3 also leads on rating (4.7 vs 4.5) and ratings volume (167 vs 20). StringMaster Pro's advantage is review sentiment (67% vs 57%) and iOS requirement (13.0 vs 16.0). On ads, in-app purchases, monetization model and device support there is nothing between them.

StringMaster Pro costs $14.99 and Scaler 3 $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scaler 3 holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Scaler 3 has 167 ratings behind it against 20, so its average is the more settled of the two. Written reviews complicate that: 67% of StringMaster Pro's written reviews are positive against 57% of Scaler 3's, so the app with the better star average is not the one people write more warmly about.

StringMaster Pro ships an update every 3 months, Scaler 3 fortnightly. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | StringMaster Pro | Scaler 3 |
| --- | --- | --- |
| Price | $14.99 | **$12.99** |
| Rating | [4.5 (20 ratings)](https://appshunter.io/ios/app/stringmaster-pro/id972426361/reviews) | **[4.7 (167 ratings)](https://appshunter.io/ios/app/scaler-3/id6749147552/reviews)** |
| Number of ratings | 20 | **167** |
| Positive reviews | **66.7% of reviews** | 56.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Paid | Paid |
| Size | 171 MB | 1.1 GB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPad, Mac** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Great Apptitude Pty Ltd](https://appshunter.io/developer/1519213669) | [Scaler Music](https://appshunter.io/developer/1603180477) |

## What reviewers say

### StringMaster Pro

[App page](https://appshunter.io/ios/app/stringmaster-pro/id972426361)

This advanced music app helps musicians of all levels learn and master fretted instruments. It offers tools for chords, scales, songwriting, and includes a tuner and fretboard learning system. Supports a wide range of instruments and integrates with wireless Fretlight Guitars.

**Highlights:** Chord building and detection, Fretboard learning system, Advanced songwriting tools, Chromatic tuner and metronome, Instrument comparison, MIDI output

**In-app purchases:** none


### Scaler 3

[App page](https://appshunter.io/ios/app/scaler-3/id6749147552)

This music theory workstation helps you discover chords, explore harmony, and build complete musical ideas. It offers a redesigned workflow, expanded creative potential, and powerful new capabilities for songwriting and music production.

**Highlights:** Discover music's key with MIDI and audio detection, Access over 1,000 chord sets, keys, and modes, Build intelligent chord progressions with automatic voice-leading, Structure full musical ideas with Scenes and Arrange Page, Transform chords into melodies, basslines, and phrases, Explore harmony with Circle of Fifths and modulation tools, Host AUv3 plugins and interoperate with desktop versions

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is StringMaster Pro free?

StringMaster Pro costs $14.99, with no in-app purchases.

### Is Scaler 3 free?

Scaler 3 costs $12.99, with no in-app purchases.

### Which has better reviews, StringMaster Pro or Scaler 3?

Scaler 3 is rated higher. StringMaster Pro averages 4.5 out of 5 from 20 ratings, while Scaler 3 averages 4.7 from 167 ratings.

### Do StringMaster Pro or Scaler 3 have ads?

Neither StringMaster Pro nor Scaler 3 shows ads.

### Which is updated more often, StringMaster Pro or Scaler 3?

StringMaster Pro ships an update every 3 months, and Scaler 3 fortnightly. Most recently, StringMaster Pro was updated on October 24, 2026 and Scaler 3 on October 30, 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.*