# Population Simulator vs Epicycles

The clearest difference is in-app purchases: Epicycles at none against Population Simulator's 1. Epicycles also leads on ads (none vs shown) and update cadence (every 5 days vs every 7 months). On price, device support and iOS requirement there is nothing between them.

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

Population Simulator ships an update every 7 months, Epicycles every 5 days. The most recent releases landed on October 5, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Population Simulator | Epicycles |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/epicycles/id6450433959/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Every 5 days** |
| Monetization | — | Free |
| Size | 5 MB | 4 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TAIKI HIRATA](https://appshunter.io/developer/719880632) | [Limit Point Software](https://appshunter.io/developer/377981570) |

## What reviewers say

### Population Simulator

[App page](https://appshunter.io/ios/app/population-simulator/id882348321)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add Output Function | $0.99 | 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 Population Simulator free?

Population Simulator is free to download, with in-app purchases available.

### Is Epicycles free?

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

### Do Population Simulator or Epicycles have ads?

Population Simulator shows ads; Epicycles does not.

### Which is updated more often, Population Simulator or Epicycles?

Population Simulator ships an update every 7 months, and Epicycles every 5 days. Most recently, Population Simulator was updated on October 5, 2026 and Epicycles on September 21, 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.*