# Spiral Corrector vs F.A.S.T

The clearest difference is rating: F.A.S.T at 4.6 against Spiral Corrector's 3.6. F.A.S.T also leads on in-app purchases (none vs 1) and review sentiment (100% vs 71%). Spiral Corrector's advantage is iOS requirement (9.3 vs 15.6). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Spiral Corrector sells 1 one-off in-app purchase. F.A.S.T asks for nothing beyond the download.

F.A.S.T holds the better App Store score, 4.6 against 3.6. Both are backed by a comparable volume of ratings — 45 and 23 respectively. Written reviews point the same way: 71% of Spiral Corrector's written reviews are positive against 100% of F.A.S.T's.

Spiral Corrector ships an update every 14 months, F.A.S.T every 19 months. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Spiral Corrector | F.A.S.T |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (45 ratings)](https://appshunter.io/ios/app/spiral-corrector/id478699256/reviews) | **[4.6 (23 ratings)](https://appshunter.io/ios/app/fast/id1217030092/reviews)** |
| Number of ratings | **45** | 23 |
| Positive reviews | 71.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 14 months** | Every 19 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 41 MB | 4 MB |
| Requires iOS | **9.3** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anatoly Weinstein](https://appshunter.io/developer/385589772) | [Philippe Zay](https://appshunter.io/developer/1200498230) |

## What reviewers say

### Spiral Corrector

[App page](https://appshunter.io/ios/app/spiral-corrector/id478699256)

Enhance handwriting accuracy and dexterity with this app. It offers a fun way to practice drawing spirals, improving fine motor skills for all ages. Experiment with various colors, thicknesses, and effects to create unique designs.

**Highlights:** Improve penmanship, Enhance hand and finger motility, Learn to draw spirals, Adjust painting speed, Combine colors and effects, Change wheels and holes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Export, Remove Ads | $2.99 | one-time |


### 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


## Frequently asked questions

### Is Spiral Corrector free?

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

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

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

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

F.A.S.T is rated higher. Spiral Corrector averages 3.6 out of 5 from 45 ratings, while F.A.S.T averages 4.6 from 23 ratings.

### Do Spiral Corrector or F.A.S.T have ads?

Neither Spiral Corrector nor F.A.S.T shows ads.

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

Spiral Corrector ships an update every 14 months, and F.A.S.T every 19 months. Most recently, Spiral Corrector was updated on October 17, 2026 and F.A.S.T on October 12, 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.*