# Fret & Key vs StringTrue

The clearest difference is in-app purchases: StringTrue at none against Fret & Key's 1. Fret & Key's advantage is update cadence (every 9 days vs every 3 weeks) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Fret & Key sells 1 one-off in-app purchase. StringTrue asks for nothing beyond the download.

Fret & Key ships an update every 9 days, StringTrue every 3 weeks. The most recent releases landed on October 11, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Fret & Key | StringTrue |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fret-and-key/id6798013390/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Monetization | Free | — |
| Size | 124 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Curious Labs](https://appshunter.io/developer/309017449) | [冲 张](https://appshunter.io/developer/6804530906) |

## What reviewers say

### Fret & Key

[App page](https://appshunter.io/ios/app/fret-and-key/id6798013390)

This music app helps you identify chords, scales, and song keys. It features a chord finder, identifier, key finder, and an accurate tuner for various instruments. Designed for simplicity and speed, it offers essential tools without subscriptions or ads.

**Highlights:** Chord finder for piano and stringed instruments, Chord identifier and key analysis, Song key detection, Scales and chord families, Accurate instrument tuner, Clean, quick navigation

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Unlock | $7.99 | one-time |


### StringTrue

[App page](https://appshunter.io/ios/app/stringtrue-guitar-tuner/id6804614229)

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

**In-app purchases:** none


## Frequently asked questions

### Is Fret & Key free?

Fret & Key is free to download, with in-app purchases available.

### Is StringTrue free?

StringTrue is free to download, with no in-app purchases.

### Do Fret & Key or StringTrue have ads?

Neither Fret & Key nor StringTrue shows ads.

### Which is updated more often, Fret & Key or StringTrue?

Fret & Key ships an update every 9 days, and StringTrue every 3 weeks. Most recently, Fret & Key was updated on October 11, 2026 and StringTrue on October 14, 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.*