# Tango Rx vs CK

The clearest difference is rating: Tango Rx at 3.0 against CK's 1.4. Tango Rx also leads on review sentiment (33% vs 0%) and update cadence (monthly vs every 9 months). CK's advantage is ratings volume (19 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Tango Rx holds the better App Store score, 3.0 against 1.4. That said, the two scores are not equally well evidenced: CK has 19 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 33% of Tango Rx's written reviews are positive against 0% of CK's.

Tango Rx ships an update monthly, CK every 9 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Tango Rx | CK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/tango-rx/id342162185/reviews)** | [1.4 (19 ratings)](https://appshunter.io/ios/app/ck-auth/id1342083838/reviews) |
| Number of ratings | 1 | **19** |
| Positive reviews | **33.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 9 months |
| Monetization | Free | Free |
| Size | 9 MB | 2 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Liberty Source](https://appshunter.io/developer/342162188) | [ContentKeeper Technologies](https://appshunter.io/developer/1342083837) |

## What reviewers say

### Tango Rx

[App page](https://appshunter.io/ios/app/tango-rx/id342162185)

This app helps educators streamline student assessment, progress monitoring, and instruction. It simplifies benchmark administration and response recording, providing immediate access to student data for improved achievement.

**Highlights:** Streamline assessment and progress monitoring, Simplify benchmark administration, Effortless recording of student responses, Immediate access to class/individual student profiles, Automated data analysis and tracking, Automated instructional focus and tracking

**Features:** macOS Compatibility

**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 Tango Rx free?

Tango Rx 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, Tango Rx or CK?

Tango Rx is rated higher. Tango Rx averages 3.0 out of 5 from 1 ratings, while CK averages 1.4 from 19 ratings.

### Do Tango Rx or CK have ads?

Neither Tango Rx nor CK shows ads.

### Which is updated more often, Tango Rx or CK?

Tango Rx ships an update monthly, and CK every 9 months. Most recently, Tango Rx was updated on November 6, 2026 and CK on November 2, 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.*