# Poly Rules! vs The Head Slam

The clearest difference is ads: Poly Rules! at none against The Head Slam's shown. Poly Rules! also leads on update cadence (monthly vs every 16 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Poly Rules! ships an update monthly, The Head Slam every 16 months. The most recent releases landed on September 24, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Poly Rules! | The Head Slam |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (13 ratings)](https://appshunter.io/ios/app/poly-rules/id1115877374/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 16 months |
| Monetization | Free | — |
| Size | 111 MB | 34 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Northeastern University Information Services](https://appshunter.io/developer/455790172) | [Safak Yalcinkaya](https://appshunter.io/developer/1626278233) |

## What reviewers say

### Poly Rules!

[App page](https://appshunter.io/ios/app/poly-rules/id1115877374)

A challenging sorting game where the rules dynamically change as you progress. It offers increasingly complex scenarios to test your cognitive abilities. Researchers can inquire about using the game for studies.

**Highlights:** Dynamic rule changes, Increasingly complex scenarios, Cognitive benefit focus, Research support available, Log storage and analytics (coming soon)

**Features:** macOS Compatibility

**In-app purchases:** none


### The Head Slam

[App page](https://appshunter.io/ios/app/the-head-slam/id1626294221)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Poly Rules! free?

Poly Rules! is free to download, with no in-app purchases.

### Is The Head Slam free?

The Head Slam is free to download, with no in-app purchases.

### Do Poly Rules! or The Head Slam have ads?

The Head Slam shows ads; Poly Rules! does not.

### Which is updated more often, Poly Rules! or The Head Slam?

Poly Rules! ships an update monthly, and The Head Slam every 16 months. Most recently, Poly Rules! was updated on September 24, 2026 and The Head Slam on October 1, 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.*