# Fourier Series Visualiser vs Thesius

The clearest difference is update cadence: Thesius at every 4 days against Fourier Series Visualiser's every 11 months. Thesius also leads on iOS requirement (15.6 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fourier Series Visualiser ships an update every 11 months, Thesius every 4 days. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Fourier Series Visualiser | Thesius |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (6 ratings)](https://appshunter.io/ios/app/fourier-series-visualiser/id1582827502/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 2 MB | 215 MB |
| Requires iOS | 26.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jack Finnis](https://appshunter.io/developer/1633101066) | [Seigneur Consults Limited](https://appshunter.io/developer/1469317635) |

## What reviewers say

### Fourier Series Visualiser

[App page](https://appshunter.io/ios/app/fourier-series-visualiser/id1582827502)

Create intricate epicycle drawings by tracing any shape with your finger. This free app visualizes the mathematical principles behind Fourier series, allowing you to adjust coefficients for different approximations and import SVG files for unique artwork. It's perfect for students, teachers, and math enthusiasts.

**Highlights:** Draw custom shapes for epicycle generation, Adjust Fourier coefficients for approximation levels, Import SVG files for artwork transformation, Visualize complex Fourier series analysis, Share drawings with friends

**Features:** macOS Compatibility

**In-app purchases:** none


### Thesius

[App page](https://appshunter.io/ios/app/thesius/id6743826401)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fourier Series Visualiser free?

Fourier Series Visualiser is free to download, with no in-app purchases.

### Is Thesius free?

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

### Do Fourier Series Visualiser or Thesius have ads?

Neither Fourier Series Visualiser nor Thesius shows ads.

### Which is updated more often, Fourier Series Visualiser or Thesius?

Fourier Series Visualiser ships an update every 11 months, and Thesius every 4 days. Most recently, Fourier Series Visualiser was updated on October 24, 2026 and Thesius on October 8, 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.*