# F.A.S.T vs Attracteur

The clearest difference is price: F.A.S.T at Free against Attracteur's $2.99. F.A.S.T also leads on ratings volume (25 vs 1). Attracteur's advantage is rating (5.0 vs 4.6). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

F.A.S.T is free to download; Attracteur costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Attracteur holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: F.A.S.T has 25 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

F.A.S.T ships an update every 19 months, Attracteur every 25 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | F.A.S.T | Attracteur |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.6 (25 ratings)](https://appshunter.io/ios/app/fast/id1217030092/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/attracteur/id1572189546/reviews)** |
| Number of ratings | **25** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 19 months** | Every 25 months |
| Monetization | **Free** | Paid |
| Size | 4 MB | 3 MB |
| Requires iOS | **15.6** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Philippe Zay](https://appshunter.io/developer/1200498230) | [Sylvain Lambert](https://appshunter.io/developer/783315608) |

## What reviewers say

### F.A.S.T

[App page](https://appshunter.io/ios/app/fast/id1217030092)

Create and customize mesmerizing mathematical spirals, including Archimedean and logarithmic forms. Offers intuitive controls for precise adjustments to curvature, color, and patterns. Ideal for creative discovery and educational exploration.

**Highlights:** Archimedean & Logarithmic Spirals, Intuitive Controls, Dynamic Colorization, Expert Mode, Dark Mode Support, Cross-device Compatibility

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

**In-app purchases:** none


### Attracteur

[App page](https://appshunter.io/ios/app/attracteur/id1572189546)

Explore the captivating realm of mathematical attractors. This application reveals the inherent beauty of chaos through interactive visualizations. It's designed for anyone curious about the intricate patterns found in complex systems.

**Highlights:** Mathematical attractor exploration, Chaos theory visualization, Interactive learning, Educational content, Beautiful mathematical patterns

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

**In-app purchases:** none


## Frequently asked questions

### Is F.A.S.T free?

F.A.S.T is free to download, with no in-app purchases.

### Is Attracteur free?

Attracteur costs $2.99, with no in-app purchases.

### Which has better reviews, F.A.S.T or Attracteur?

Attracteur is rated higher. F.A.S.T averages 4.6 out of 5 from 25 ratings, while Attracteur averages 5.0 from 1 ratings.

### Do F.A.S.T or Attracteur have ads?

Neither F.A.S.T nor Attracteur shows ads.

### Which is updated more often, F.A.S.T or Attracteur?

F.A.S.T ships an update every 19 months, and Attracteur every 25 months. Most recently, F.A.S.T was updated on November 2, 2026 and Attracteur on November 3, 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.*