# Poly Rules! vs Saving Memo

The clearest difference is update cadence: Poly Rules! at monthly against Saving Memo's every 50 months. 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.

Poly Rules! ships an update monthly, Saving Memo every 50 months. The most recent releases landed on September 8, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | Poly Rules! | Saving Memo |
| --- | --- | --- |
| 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 | No |
| Update frequency | **Monthly** | Every 50 months |
| Monetization | Free | — |
| Size | 111 MB | 92 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Northeastern University Information Services](https://appshunter.io/developer/455790172) | [University of California Riverside](https://appshunter.io/developer/888130363) |

## 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


### Saving Memo

[App page](https://appshunter.io/ios/app/saving-memo/id1553319366)

**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 Saving Memo free?

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

### Do Poly Rules! or Saving Memo have ads?

Neither Poly Rules! nor Saving Memo shows ads.

### Which is updated more often, Poly Rules! or Saving Memo?

Poly Rules! ships an update monthly, and Saving Memo every 50 months. Most recently, Poly Rules! was updated on September 8, 2026 and Saving Memo on May 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.*