# π Challenge vs Pi

The clearest difference is update cadence: Pi at every 2 days against π Challenge's every 9 months. π Challenge's advantage is iOS requirement (13.0 vs 17.6). 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.

π Challenge ships an update every 9 months, Pi every 2 days. Both last shipped on October 10, 2026.

## The numbers

| Metric | π Challenge | Pi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 days** |
| Size | 29 MB | 4 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Warashibe Tech LLC](https://appshunter.io/developer/1567747524) | [Olivier Mallet](https://appshunter.io/developer/1884261967) |

## What reviewers say

### π Challenge

[App page](https://appshunter.io/ios/app/challenge/id6743357759)

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

**In-app purchases:** none


### Pi

[App page](https://appshunter.io/ios/app/pi-infinite-digits/id6760476465)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is π Challenge free?

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

### Is Pi free?

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

### Do π Challenge or Pi have ads?

Neither π Challenge nor Pi shows ads.

### Which is updated more often, π Challenge or Pi?

π Challenge ships an update every 9 months, and Pi every 2 days. Most recently, π Challenge was updated on October 10, 2026 and Pi on October 10, 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.*