# Poly Rules! vs 37S

The clearest difference is rating: Poly Rules! at 4.8 against 37S's 4.0. Poly Rules! also leads on update cadence (monthly vs every 5 months) and ratings volume (13 vs 2). 37S's advantage is review sentiment (100% vs 80%). On price, ads, in-app purchases and monetization model 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! holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Poly Rules! has 13 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 80% of Poly Rules!'s written reviews are positive against 100% of 37S's, so the app with the better star average is not the one people write more warmly about.

Poly Rules! ships an update monthly, 37S every 5 months. The most recent releases landed on September 24, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Poly Rules! | 37S |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (13 ratings)](https://appshunter.io/ios/app/poly-rules/id1115877374/reviews)** | [4.0 (2 ratings)](https://appshunter.io/ios/app/37s-37-seconds/id1602845368/reviews) |
| Number of ratings | **13** | 2 |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free | Free |
| Size | 111 MB | 61 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Northeastern University Information Services](https://appshunter.io/developer/455790172) | [Andreii Simaranov](https://appshunter.io/developer/1676912439) |

## 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


### 37S

[App page](https://appshunter.io/ios/app/37s-37-seconds/id1602845368)

A challenging arcade game where players must navigate a square through a maze of moving blocks and walls for 37 seconds. It's an addictive test of reflexes and precision, rumored to be used by the US Air Force for pilot training.

**Highlights:** Hold and drag gameplay, Avoid moving blocks and walls, Test reflexes and precision, Addictive challenge, Simple controls

**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 37S free?

37S is free to download, with no in-app purchases.

### Which has better reviews, Poly Rules! or 37S?

Poly Rules! is rated higher. Poly Rules! averages 4.8 out of 5 from 13 ratings, while 37S averages 4.0 from 2 ratings.

### Do Poly Rules! or 37S have ads?

Neither Poly Rules! nor 37S shows ads.

### Which is updated more often, Poly Rules! or 37S?

Poly Rules! ships an update monthly, and 37S every 5 months. Most recently, Poly Rules! was updated on September 24, 2026 and 37S on October 16, 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.*