# π ~ Pi Fun App. vs π Pi Challenge

The clearest difference is in-app purchases: π ~ Pi Fun App. at none against π Pi Challenge's 1. π ~ Pi Fun App. also leads on update cadence (daily vs every 2 months). π Pi Challenge's advantage is iOS requirement (13.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. π Pi Challenge sells 1 in-app purchase, starting at $0.99 per month. π ~ Pi Fun App. asks for nothing beyond the download.

π ~ Pi Fun App. ships an update daily, π Pi Challenge every 2 months. The most recent releases landed on September 6, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | π ~ Pi Fun App. | π Pi Challenge |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Daily** | Every 2 months |
| Size | 17 MB | 73 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ryo Tsudukihashi](https://appshunter.io/developer/1320583602) | [SIC Company Limited](https://appshunter.io/developer/1800842356) |

## What reviewers say

### π ~ Pi Fun App.

[App page](https://appshunter.io/ios/app/pi-fun-app/id6566185298)

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

**In-app purchases:** none


### π Pi Challenge

[App page](https://appshunter.io/ios/app/pi-challenge/id6756227034)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $0.99 | per month |


## Frequently asked questions

### Is π ~ Pi Fun App. free?

π ~ Pi Fun App. is free to download, with no in-app purchases.

### Is π Pi Challenge free?

π Pi Challenge is free to download, with in-app purchases available.

### Do π ~ Pi Fun App. or π Pi Challenge have ads?

Both π ~ Pi Fun App. and π Pi Challenge show ads.

### Which is updated more often, π ~ Pi Fun App. or π Pi Challenge?

π ~ Pi Fun App. ships an update daily, and π Pi Challenge every 2 months. Most recently, π ~ Pi Fun App. was updated on September 6, 2026 and π Pi Challenge on September 18, 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.*