Tango Rx vs CK
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tango Rx
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.
- 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
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Tango RX, the prescription for student success, helps pre-school to high school educators streamline assessment, progress monitoring, instruction and intervention to maximize student achievement. Developed for teacher, instructional specialist, and coaches in mind, Tango RX makes benchmark and progress monitoring administration a simple and seamless task. With Tango Rx, the recording of student responses is effortless and understanding student progress and needs is intuitive and straight-forward. Assessment administrators simply select one of the pre-loaded students, and then select one of the recommended benchmarks or progress monitoring assessments. Tango Rx leads the teacher through the assessment tasks so that all teachers are giving the assessments in the most consistent and reliable manner. Once the assessment has been administered, the teacher has immediate access to a class or individual student profile on the device and on the web after wireless synchronization. Teachers can get back to teaching using automated Tango RX data analysis and tracking tools both on the Tango Central website and on the device. Features: -- Automated Teacher Roster Loads -- Automated Assessment Navigation -- Automated Device and Web Reporting -- Automated Instructional Focus and Tracking -- Automated Student Grouping and Progress Profiles
CK
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.
- Secure internet browsing
- Identity-based reporting
- Policy-based filtering
- CIPA compliance
- Global web access control
- MDM deployment
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The ContentKeeper CK-AUTH App provides users with a protected Internet browsing experience in conjunctions with the ContentKeeper Secure Internet Gateway (CK-SIG) system. The App provides for highly granular users-identity based reporting along with single sign-on support. User access to Internet resources are controlled by a sophisticated policy-based filtering engine. Features :- • Allows iOS users to have the same level of filtered and controlled web browsing access when either on-premises or travelling globally • Provides for policy-based high performance visibility of all web traffic and search engine activity • Ensures CIPA compliance for the education sector The system is easily deployed via a supported MDM system to the iOS endpoints. The system automatically detects when an iOS device is on-network or mobile and adjusts accordingly. The app does not involve the use of a Proxy server. Note: ContentKeeper Secure Web Gateway V190 or above and associated licence subscription is required.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Tango Rx | CK |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) — better | 1.4 (19 ratings) |
| Positive reviews | 33.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 1 | 19 — better |
| Update frequency | Monthly — better | Every 9 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 9 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Liberty Source | ContentKeeper Technologies |
Customer experience
Tango Rx
CK
In-app purchases
Tango Rx
No in-app purchases
CK
No in-app purchases








