# Spiral Corrector vs Epicycles

The clearest difference is rating: Epicycles at 5.0 against Spiral Corrector's 3.6. Epicycles also leads on in-app purchases (none vs 1) and update cadence (every 5 days vs every 14 months). Spiral Corrector's advantage is ratings volume (45 vs 2) and iOS requirement (9.3 vs 15.0). On price, ads and device support there is nothing between them.

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

Epicycles holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: Spiral Corrector has 45 ratings behind it against 2, so its average is the more settled of the two.

Spiral Corrector ships an update every 14 months, Epicycles every 5 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Spiral Corrector | Epicycles |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (45 ratings)](https://appshunter.io/ios/app/spiral-corrector/id478699256/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/epicycles/id6450433959/reviews)** |
| Number of ratings | **45** | 2 |
| Positive reviews | 71.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 5 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 41 MB | 4 MB |
| Requires iOS | **9.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anatoly Weinstein](https://appshunter.io/developer/385589772) | [Limit Point Software](https://appshunter.io/developer/377981570) |

## 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 |


### Epicycles

[App page](https://appshunter.io/ios/app/epicycles/id6450433959)

Explore the visualization of complex Fourier series through interactive epicycles. Create and analyze approximations of parametric curves and complex functions. Save animations and export custom terms for later use.

**Highlights:** Visualize Fourier series of 2D functions, Create epicycles from drawn curves, Save custom terms to documents, Export animations as GIFs, Adjust time and number of terms, Interactive graphic elements

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Spiral Corrector free?

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

### Is Epicycles free?

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

### Which has better reviews, Spiral Corrector or Epicycles?

Epicycles is rated higher. Spiral Corrector averages 3.6 out of 5 from 45 ratings, while Epicycles averages 5.0 from 2 ratings.

### Do Spiral Corrector or Epicycles have ads?

Neither Spiral Corrector nor Epicycles shows ads.

### Which is updated more often, Spiral Corrector or Epicycles?

Spiral Corrector ships an update every 14 months, and Epicycles every 5 days. Most recently, Spiral Corrector was updated on October 24, 2026 and Epicycles on October 24, 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.*