# π Challenge vs PiMemory

The clearest difference is ads: π Challenge at none against PiMemory's shown. π Challenge also leads on iOS requirement (13.0 vs 16.6). PiMemory's advantage is update cadence (fortnightly vs every 9 months). On price, 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, PiMemory fortnightly. The most recent releases landed on September 24, 2026 and March 19, 2026 respectively.

## The numbers

| Metric | π Challenge | PiMemory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Fortnightly** |
| Size | 29 MB | 11 MB |
| Requires iOS | **13.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Warashibe Tech LLC](https://appshunter.io/developer/1567747524) | [Younghan Kim](https://appshunter.io/developer/1859100256) |

## What reviewers say

### π Challenge

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

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

**In-app purchases:** none


### PiMemory

[App page](https://appshunter.io/ios/app/pimemory/id6756199880)

**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 PiMemory free?

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

### Do π Challenge or PiMemory have ads?

PiMemory shows ads; π Challenge does not.

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

π Challenge ships an update every 9 months, and PiMemory fortnightly. Most recently, π Challenge was updated on September 24, 2026 and PiMemory on March 19, 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.*