# CheckLink vs Symmetry Self Registration

The clearest difference is iOS requirement: CheckLink at 11.0 against Symmetry Self Registration's 17. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CheckLink ships an update every 4 weeks, Symmetry Self Registration every 6 weeks. The most recent releases landed on October 26, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | CheckLink | Symmetry Self Registration |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 6 weeks |
| Size | 36 MB | 28 MB |
| Requires iOS | **11.0** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Computer Fanatics Limited](https://appshunter.io/developer/977857075) | [AMAG Technology, Inc.](https://appshunter.io/developer/981139066) |

## What reviewers say

### CheckLink

[App page](https://appshunter.io/ios/app/checklink/id1465547289)

**Features:** macOS Compatibility

**In-app purchases:** none


### Symmetry Self Registration

[App page](https://appshunter.io/ios/app/symmetry-self-registration/id6479510032)

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

**In-app purchases:** none


## Frequently asked questions

### Is CheckLink free?

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

### Is Symmetry Self Registration free?

Symmetry Self Registration is free to download, with no in-app purchases.

### Do CheckLink or Symmetry Self Registration have ads?

Neither CheckLink nor Symmetry Self Registration shows ads.

### Which is updated more often, CheckLink or Symmetry Self Registration?

CheckLink ships an update every 4 weeks, and Symmetry Self Registration every 6 weeks. Most recently, CheckLink was updated on October 26, 2026 and Symmetry Self Registration 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.*