# Open CLS vs ParaLab

The clearest difference is update cadence: ParaLab at every 7 months against Open CLS's every 24 months. Open CLS's advantage is iOS requirement (13.0 vs 17.6). 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.

Open CLS ships an update every 24 months, ParaLab every 7 months. The most recent releases landed on September 30, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Open CLS | ParaLab |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/paralab/id1569587986/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 24 months | **Every 7 months** |
| Monetization | — | Free |
| Size | 17 MB | 92 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Clinical Leadership Solutions LTD](https://appshunter.io/developer/1434082548) | [CoderBot Ltd.](https://appshunter.io/developer/1569587988) |

## What reviewers say

### Open CLS

[App page](https://appshunter.io/ios/app/open-cls/id1479939378)

**In-app purchases:** none


### ParaLab

[App page](https://appshunter.io/ios/app/paralab/id1569587986)

This educational app serves as a comprehensive reference for parasitology in a laboratory setting. It provides essential information for students and professionals in the medical field.

**Highlights:** Parasitology reference, Laboratory focus, Medical education, Comprehensive information

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

**In-app purchases:** none


## Frequently asked questions

### Is Open CLS free?

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

### Is ParaLab free?

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

### Do Open CLS or ParaLab have ads?

Neither Open CLS nor ParaLab shows ads.

### Which is updated more often, Open CLS or ParaLab?

Open CLS ships an update every 24 months, and ParaLab every 7 months. Most recently, Open CLS was updated on September 30, 2026 and ParaLab on October 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*