# Fourier Series Visualiser vs LingoShelf

The clearest difference is update cadence: LingoShelf at monthly against Fourier Series Visualiser's every 11 months. LingoShelf also leads on iOS requirement (15.1 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, LingoShelf monthly. The most recent releases landed on October 2, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Fourier Series Visualiser | LingoShelf |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/fourier-series-visualiser/id1582827502/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Monthly** |
| Monetization | Free | — |
| Size | 2 MB | 28 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jack Finnis](https://appshunter.io/developer/1633101066) | [Sahyun Kim](https://appshunter.io/developer/1400561579) |

## 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


### LingoShelf

[App page](https://appshunter.io/ios/app/lingoshelf/id6745850127)

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

**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 LingoShelf free?

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

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

Neither Fourier Series Visualiser nor LingoShelf shows ads.

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

Fourier Series Visualiser ships an update every 11 months, and LingoShelf monthly. Most recently, Fourier Series Visualiser was updated on October 2, 2026 and LingoShelf on October 16, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*