# String Theory vs ScaleJammer

The clearest difference is price: ScaleJammer at Free against String Theory's $1.99. ScaleJammer also leads on iOS requirement (18.6 vs 26.0). String Theory's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

ScaleJammer is free to download; String Theory costs $1.99 up front. ScaleJammer sells 1 one-off in-app purchase. String Theory asks for nothing beyond the download.

## The numbers

| Metric | String Theory | ScaleJammer |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/string-theory-guitar-practice/id6760247019/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Monetization | Paid | — |
| Size | 10 MB | 8 MB |
| Requires iOS | 26.0 | **18.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DANIEL NIKOLAS SZTURM](https://appshunter.io/developer/1883123507) | [Orcun Keskin](https://appshunter.io/developer/1681326325) |

## What reviewers say

### String Theory

[App page](https://appshunter.io/ios/app/string-theory-guitar-practice/id6760247019)

This app helps guitarists explore scales and chords with an interactive fretboard. It allows users to compare scales, test custom tunings, and record riff ideas. The tool is designed for practicing improvisation, learning theory, and saving musical inspiration.

**Highlights:** Interactive guitar fretboard with scale mapping, Scale and Chord Finder tools, Custom tunings with octave control, Riff recording and vault organization, Left-handed mode, Scale comparison overlay

**Features:** macOS Compatibility

**In-app purchases:** none


### ScaleJammer

[App page](https://appshunter.io/ios/app/scalejammer/id6761661432)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ScaleJammer Pro | $4.99 | one-time |


## Frequently asked questions

### Is String Theory free?

String Theory costs $1.99, with no in-app purchases.

### Is ScaleJammer free?

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

### Do String Theory or ScaleJammer have ads?

Neither String Theory nor ScaleJammer shows ads.

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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.*