# Untangle. Rings and Lines vs Math Crossword Path Brain Test

The clearest difference is update cadence: Math Crossword Path Brain Test at every 4 days against Untangle. Rings and Lines's every 32 months. Untangle. Rings and Lines's advantage is iOS requirement (8.1 vs 15.0). 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.

Untangle. Rings and Lines ships an update every 32 months, Math Crossword Path Brain Test every 4 days. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Untangle. Rings and Lines | Math Crossword Path Brain Test |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 32 months | **Every 4 days** |
| Size | 66 MB | 201 MB |
| Requires iOS | **8.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Ruslan Goncharenko](https://appshunter.io/developer/934710362) | [Chengdu Infinite Seek Technology Co., Ltd](https://appshunter.io/developer/1835571102) |

## What reviewers say

### Untangle. Rings and Lines

[App page](https://appshunter.io/ios/app/untangle-rings-and-lines/id1200383809)

**Features:** macOS Compatibility

**In-app purchases:** none


### Math Crossword Path Brain Test

[App page](https://appshunter.io/ios/app/math-crossword-path-brain-test/id6755596521)

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

**In-app purchases:** none


## Frequently asked questions

### Is Untangle. Rings and Lines free?

Untangle. Rings and Lines is free to download, with no in-app purchases.

### Is Math Crossword Path Brain Test free?

Math Crossword Path Brain Test is free to download, with no in-app purchases.

### Do Untangle. Rings and Lines or Math Crossword Path Brain Test have ads?

Both Untangle. Rings and Lines and Math Crossword Path Brain Test show ads.

### Which is updated more often, Untangle. Rings and Lines or Math Crossword Path Brain Test?

Untangle. Rings and Lines ships an update every 32 months, and Math Crossword Path Brain Test every 4 days. Most recently, Untangle. Rings and Lines was updated on October 29, 2026 and Math Crossword Path Brain Test on October 24, 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.*