# FretFlo vs Pythagorean Tuner

The clearest difference is in-app purchases: Pythagorean Tuner at none against FretFlo's 1. Pythagorean Tuner also leads on update cadence (every 2 weeks vs every 15 months) and iOS requirement (17.0 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. FretFlo sells 1 one-off in-app purchase. Pythagorean Tuner asks for nothing beyond the download.

FretFlo ships an update every 15 months, Pythagorean Tuner every 2 weeks. The most recent releases landed on October 19, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | FretFlo | Pythagorean Tuner |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pythagorean-tuner/id6791005167/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 3 MB | 1 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jason Baker](https://appshunter.io/developer/1819826508) | [Leonid Iogansen](https://appshunter.io/developer/762098337) |

## What reviewers say

### FretFlo

[App page](https://appshunter.io/ios/app/fretflo/id6747094224)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Upgrade | $7.99 | one-time |


### Pythagorean Tuner

[App page](https://appshunter.io/ios/app/pythagorean-tuner/id6791005167)

This app offers a precision tuning experience for string musicians and singers. It tunes to pure Pythagorean intonation, distinguishing between enharmonic pitches for a more authentic sound.

**Highlights:** True Pythagorean intonation, Pure 3:2 perfect fifths, Distinguishes enharmonic pitches, Precision tuning for musicians, Supports violin, cello, viola, bass, and singers

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

**In-app purchases:** none


## Frequently asked questions

### Is FretFlo free?

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

### Is Pythagorean Tuner free?

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

### Do FretFlo or Pythagorean Tuner have ads?

Neither FretFlo nor Pythagorean Tuner shows ads.

### Which is updated more often, FretFlo or Pythagorean Tuner?

FretFlo ships an update every 15 months, and Pythagorean Tuner every 2 weeks. Most recently, FretFlo was updated on October 19, 2026 and Pythagorean Tuner on October 9, 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.*