# Epicycles vs Learning Transformer

The clearest difference is in-app purchases: Epicycles at none against Learning Transformer's 1. Epicycles also leads on iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | Epicycles | Learning Transformer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/epicycles/id6450433959/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Monetization | Free | — |
| Size | 4 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Limit Point Software](https://appshunter.io/developer/377981570) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### 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


### Learning Transformer

[App page](https://appshunter.io/ios/app/learning-transformer/id6802260008)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| the decoder | $3.99 | one-time |


## Frequently asked questions

### Is Epicycles free?

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

### Is Learning Transformer free?

Learning Transformer is free to download, with in-app purchases available.

### Do Epicycles or Learning Transformer have ads?

Neither Epicycles nor Learning Transformer shows ads.

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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.*