# C vs X

The clearest difference is update cadence: X at monthly against C's every 27 months. On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

C ships an update every 27 months, X monthly. The most recent releases landed on October 5, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | C | X |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/x-puzzle/id1113080641/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 27 months | **Monthly** |
| Monetization | — | Free |
| Size | 3 MB | 42 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IFL Software](https://appshunter.io/developer/518163778) | [Peter Purmonen](https://appshunter.io/developer/1105997209) |

## What reviewers say

### C

[App page](https://appshunter.io/ios/app/c-line/id978549847)

**Features:** macOS Compatibility

**In-app purchases:** none


### X

[App page](https://appshunter.io/ios/app/x-puzzle/id1113080641)

Engage your mind with a fun twist on the classic 15-puzzle. Offers multiple board sizes beyond the standard grid and integrates with Game Center for high score tracking. It's a violence-free brain teaser suitable for all ages.

**Highlights:** Multiple board sizes (3x3 to 5x5), Game Center integration, High score leaderboards, No in-app purchases, Suitable for all ages, Runs on iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is C free?

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

### Is X free?

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

### Which is updated more often, C or X?

C ships an update every 27 months, and X monthly. Most recently, C was updated on October 5, 2026 and X on October 7, 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.*