# PreviewBrowser vs CK

The clearest difference is rating: PreviewBrowser at 5.0 against CK's 1.4. CK's advantage is ratings volume (18 vs 2) and device support (3 vs 1). 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.

PreviewBrowser holds the better App Store score, 5.0 against 1.4. That said, the two scores are not equally well evidenced: CK has 18 ratings behind it against 2, so its average is the more settled of the two.

PreviewBrowser ships an update every 7 months, CK every 9 months. The most recent releases landed on September 17, 2026 and July 18, 2026 respectively.

## The numbers

| Metric | PreviewBrowser | CK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/previewbrowser/id1169214525/reviews)** | [1.4 (18 ratings)](https://appshunter.io/ios/app/ck-auth/id1342083838/reviews) |
| Number of ratings | 2 | **18** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 9 months |
| Monetization | Free | Free |
| Size | 50 MB | 2 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [NWEA](https://appshunter.io/developer/1087546324) | [ContentKeeper Technologies](https://appshunter.io/developer/1342083837) |

## What reviewers say

### PreviewBrowser

[App page](https://appshunter.io/ios/app/previewbrowser/id1169214525)

This application serves as a specialized tool for educators to review test items on iOS devices. It is designed for use with the Level12 delivery platform and is not intended for general public access.

**Highlights:** Test item review, iOS device compatibility, Level12 platform integration, Educator-specific tool

**In-app purchases:** none


### CK

[App page](https://appshunter.io/ios/app/ck-auth/id1342083838)

This app offers a secure and filtered internet browsing experience for iOS users, ensuring CIPA compliance for educational institutions. It provides granular, identity-based reporting and policy-driven web access control, whether users are on-premises or traveling globally.

**Highlights:** Secure internet browsing, Identity-based reporting, Policy-based filtering, CIPA compliance, Global web access control, MDM deployment

**In-app purchases:** none


## Frequently asked questions

### Is PreviewBrowser free?

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

### Is CK free?

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

### Which has better reviews, PreviewBrowser or CK?

PreviewBrowser is rated higher. PreviewBrowser averages 5.0 out of 5 from 2 ratings, while CK averages 1.4 from 18 ratings.

### Do PreviewBrowser or CK have ads?

Neither PreviewBrowser nor CK shows ads.

### Which is updated more often, PreviewBrowser or CK?

PreviewBrowser ships an update every 7 months, and CK every 9 months. Most recently, PreviewBrowser was updated on September 17, 2026 and CK on July 18, 2026.

---

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