# Metric Flow vs Windtone by Sonofield

The clearest difference is price: Windtone by Sonofield at Free against Metric Flow's $9.99. Windtone by Sonofield also leads on update cadence (every 5 days vs every 9 months) and rating (4.9 vs 4.7). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

Windtone by Sonofield is free to download; Metric Flow costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Windtone by Sonofield holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 7 and 15 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Metric Flow ships an update every 9 months, Windtone by Sonofield every 5 days. The most recent releases landed on September 18, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Metric Flow | Windtone by Sonofield |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.7 (7 ratings)](https://appshunter.io/ios/app/metric-flow/id6749366918/reviews) | **[4.9 (15 ratings)](https://appshunter.io/ios/app/windtone-by-sonofield/id6772116401/reviews)** |
| Number of ratings | 7 | **15** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 5 days** |
| Monetization | Paid | **Free** |
| Size | 58 MB | 29 MB |
| Requires iOS | 17.5 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Thomas Quayle](https://appshunter.io/developer/1830213658) | [Sonofield Ear Trainer Education Ltd.](https://appshunter.io/developer/1789801335) |

## What reviewers say

### Metric Flow

[App page](https://appshunter.io/ios/app/metric-flow/id6749366918)

Generate endless rhythmic patterns for improvisation practice. Visualize rhythms without traditional notation and customize them with advanced options. Export rhythms as audio files for use in DAWs.

**Highlights:** Endless rhythm generation, Visual rhythm representation, Customizable rhythm patterns, Audio export (WAV, AAC), Supports complex time signatures, Built-in drone synthesizer

**Features:** macOS Compatibility

**In-app purchases:** none


### Windtone by Sonofield

[App page](https://appshunter.io/ios/app/windtone-by-sonofield/id6772116401)

This app offers a meditative ear training experience for musicians. It generates endless wind-chime melodies based on chosen scales, with adjustable complexity and real-time note labels. Enjoy a relaxing practice environment with natural ambiences and a tonic reference.

**Highlights:** Scale degree recognition, Over 30 preset scales, Real-time note labels, Adjustable melodic complexity, Natural background ambiences, Tonic reference chime, Playable chimes

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

**In-app purchases:** none


## Frequently asked questions

### Is Metric Flow free?

Metric Flow costs $9.99, with no in-app purchases.

### Is Windtone by Sonofield free?

Windtone by Sonofield is free to download, with no in-app purchases.

### Which has better reviews, Metric Flow or Windtone by Sonofield?

Windtone by Sonofield is rated higher. Metric Flow averages 4.7 out of 5 from 7 ratings, while Windtone by Sonofield averages 4.9 from 15 ratings.

### Do Metric Flow or Windtone by Sonofield have ads?

Neither Metric Flow nor Windtone by Sonofield shows ads.

### Which is updated more often, Metric Flow or Windtone by Sonofield?

Metric Flow ships an update every 9 months, and Windtone by Sonofield every 5 days. Most recently, Metric Flow was updated on September 18, 2026 and Windtone by Sonofield on September 23, 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.*