# Poly Rules! vs Shell Shockers

The clearest difference is price: Poly Rules! at Free against Shell Shockers's $0.29. Poly Rules! also leads on update cadence (monthly vs every 33 months). Shell Shockers's advantage is iOS requirement (9.0 vs 12.0). On ads, in-app purchases and device support there is nothing between them.

Poly Rules! is free to download; Shell Shockers costs $0.29 up front. Neither carries in-app purchases, so what you see is what you pay.

Poly Rules! ships an update monthly, Shell Shockers every 33 months. The most recent releases landed on September 8, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Poly Rules! | Shell Shockers |
| --- | --- | --- |
| Price | **Free** | $0.29 |
| 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 | No |
| Update frequency | **Monthly** | Every 33 months |
| Monetization | Free | — |
| Size | 111 MB | 25 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Northeastern University Information Services](https://appshunter.io/developer/455790172) | [Ranz Ursal](https://appshunter.io/developer/1116871834) |

## 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


### Shell Shockers

[App page](https://appshunter.io/ios/app/shell-shockers/id1526050390)

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

**In-app purchases:** none


## Frequently asked questions

### Is Poly Rules! free?

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

### Is Shell Shockers free?

Shell Shockers costs $0.29, with no in-app purchases.

### Do Poly Rules! or Shell Shockers have ads?

Neither Poly Rules! nor Shell Shockers shows ads.

### Which is updated more often, Poly Rules! or Shell Shockers?

Poly Rules! ships an update monthly, and Shell Shockers every 33 months. Most recently, Poly Rules! was updated on September 8, 2026 and Shell Shockers on September 20, 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.*