# Crystal Aligner v2 vs Radiology References

The clearest difference is in-app purchases: Crystal Aligner v2 at none against Radiology References's 4. Crystal Aligner v2 also leads on ads (none vs shown) and iOS requirement (12.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Radiology References sells 4 in-app purchases, starting at $1.99 per 7 days. Crystal Aligner v2 asks for nothing beyond the download.

## The numbers

| Metric | Crystal Aligner v2 | Radiology References |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 5 months |
| Size | 40 MB | 19 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Orthoclear Sağlık Teknolojileri San. Tic. Ltd. Şti.](https://appshunter.io/developer/1647709392) | [HVALABS, LLC](https://appshunter.io/developer/1875666107) |

## What reviewers say

### Crystal Aligner v2

[App page](https://appshunter.io/ios/app/crystal-aligner-v2/id6471303250)

**Features:** macOS Compatibility

**In-app purchases:** none


### Radiology References

[App page](https://appshunter.io/ios/app/radiology-references/id6744572227)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $1.99 | per 7 days |
| Monthly Premium | $5.99 | per month |
| Yearly Premium | $24.99 | per year |
| Yearly Premium | $34.99 | per year |


## Frequently asked questions

### Is Crystal Aligner v2 free?

Crystal Aligner v2 is free to download, with no in-app purchases.

### Is Radiology References free?

Radiology References is free to download, with in-app purchases available.

### Do Crystal Aligner v2 or Radiology References have ads?

Radiology References shows ads; Crystal Aligner v2 does not.

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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.*