# Line Up vs Causality Puzzle

The clearest difference is in-app purchases: Causality Puzzle at none against Line Up's 3. Line Up's advantage is update cadence (every 3 weeks vs every 6 weeks) and iOS requirement (12 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. Line Up sells 3 one-off in-app purchases. Causality Puzzle asks for nothing beyond the download.

Line Up ships an update every 3 weeks, Causality Puzzle every 6 weeks. The most recent releases landed on June 1, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Line Up | Causality Puzzle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/line-up-dots/id1451004705/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 127 MB | 90 MB |
| Requires iOS | **12** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rodolfo Seabra](https://appshunter.io/developer/1450724668) | [Gurgen Arustamyan](https://appshunter.io/developer/1884835827) |

## What reviewers say

### Line Up

[App page](https://appshunter.io/ios/app/line-up-dots/id1451004705)

Connect dots in the correct order to find the best route, collecting stars along the way. Explore hundreds of levels across five worlds with increasing difficulty, utilizing logical reasoning to solve each puzzle.

**Highlights:** Connect dots in order, Collect stars, Hundreds of levels, Five distinct worlds, Gradual difficulty increase, Logical reasoning puzzles

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 25 hints | $0.99 | one-time |
| 60 hints | $1.99 | one-time |
| Remove ADS | $2.99 | one-time |


### Causality Puzzle

[App page](https://appshunter.io/ios/app/causality-puzzle/id6760533588)

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

**In-app purchases:** none


## Frequently asked questions

### Is Line Up free?

Line Up is free to download, with in-app purchases available.

### Is Causality Puzzle free?

Causality Puzzle is free to download, with no in-app purchases.

### Do Line Up or Causality Puzzle have ads?

Both Line Up and Causality Puzzle show ads.

### Which is updated more often, Line Up or Causality Puzzle?

Line Up ships an update every 3 weeks, and Causality Puzzle every 6 weeks. Most recently, Line Up was updated on June 1, 2026 and Causality Puzzle on September 17, 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.*