# Scaler 3 vs StringVest

The clearest difference is price: StringVest at $0.99 against Scaler 3's $12.99. StringVest also leads on device support (3 vs 1). Scaler 3's advantage is update cadence (fortnightly vs every 2 months). On ads, in-app purchases and iOS requirement there is nothing between them.

Scaler 3 costs $12.99 and StringVest $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scaler 3 ships an update fortnightly, StringVest every 2 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | Scaler 3 | StringVest |
| --- | --- | --- |
| Price | $12.99 | **$0.99** |
| Rating | **[4.7 (165 ratings)](https://appshunter.io/ios/app/scaler-3/id6749147552/reviews)** | — |
| Number of ratings | **165** | — |
| Positive reviews | 56.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Paid | — |
| Size | 1.1 GB | 15 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Scaler Music](https://appshunter.io/developer/1603180477) | [Philip Vincent](https://appshunter.io/developer/1890469991) |

## What reviewers say

### 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


### StringVest

[App page](https://appshunter.io/ios/app/stringvest/id6761650269)

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

**In-app purchases:** none


## Frequently asked questions

### Is Scaler 3 free?

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

### Is StringVest free?

StringVest costs $0.99, with no in-app purchases.

### Do Scaler 3 or StringVest have ads?

Neither Scaler 3 nor StringVest shows ads.

### Which is updated more often, Scaler 3 or StringVest?

Scaler 3 ships an update fortnightly, and StringVest every 2 months. Most recently, Scaler 3 was updated on October 25, 2026 and StringVest on October 25, 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.*