# CK vs UDBapp Pro

The clearest difference is review sentiment: UDBapp Pro at 85% against CK's 0%. UDBapp Pro also leads on rating (4.8 vs 1.4) and update cadence (every 6 weeks vs every 9 months). CK's advantage is iOS requirement (14.0 vs 16). 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.

UDBapp Pro holds the better App Store score, 4.8 against 1.4. That said, the two scores are not equally well evidenced: UDBapp Pro has 2.3K ratings behind it against 18, so its average is the more settled of the two. Written reviews point the same way: 0% of CK's written reviews are positive against 85% of UDBapp Pro's.

CK ships an update every 9 months, UDBapp Pro every 6 weeks. The most recent releases landed on July 18, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | CK | UDBapp Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.4 (18 ratings)](https://appshunter.io/ios/app/ck-auth/id1342083838/reviews) | **[4.8 (2.3K ratings)](https://appshunter.io/ios/app/udbapp-pro/id1455826724/reviews)** |
| Number of ratings | 18 | **2.3K** |
| Positive reviews | 0.0% of reviews | **85.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 2 MB | 29 MB |
| Requires iOS | **14.0** | 16 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [ContentKeeper Technologies](https://appshunter.io/developer/1342083837) | [Ultimate Drill Book](https://appshunter.io/developer/1455826723) |

## What reviewers say

### 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


### UDBapp Pro

[App page](https://appshunter.io/ios/app/udbapp-pro/id1455826724)

This app helps marching band members, directors, and teachers learn and manage drill formations. It offers animated drill views, coordinate sheets, music integration, and attendance tracking for seamless rehearsal and performance preparation.

**Highlights:** Animated drill views with music, Individual coordinate sheets, Live coordinate tracking, Sheet music integration, Attendance tracking, Tap ID for performer management, Offline mode

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Helpful for learning drill
- 🚀 Efficient drill learning process
- 📱 Convenient digital format
- 🎨 Customizable user experience
- 🤖 Precise dot tracking

**What reviewers complain about**

- 🐛 Occasional glitches and bugs
- 🔍 Limited customization options
- 📱 Requires all students to have compatible devices
- 🕰️ Slow loading times
- 🔋 High battery consumption

**Reported bugs**

- Drill files disappearing after updates
- Attendance tracking issues
- Crashes when adding notes
- Drill visualization jumping between sets

**Requested features**

- Apple Watch integration
- Ability to create custom drill designs
- Improved note-taking functionality
- Offline drill playback
- Tempo adjustment for drill and music


## Frequently asked questions

### Is CK free?

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

### Is UDBapp Pro free?

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

### Which has better reviews, CK or UDBapp Pro?

UDBapp Pro is rated higher. CK averages 1.4 out of 5 from 18 ratings, while UDBapp Pro averages 4.8 from 2.3K ratings.

### Do CK or UDBapp Pro have ads?

Neither CK nor UDBapp Pro shows ads.

### Which is updated more often, CK or UDBapp Pro?

CK ships an update every 9 months, and UDBapp Pro every 6 weeks. Most recently, CK was updated on July 18, 2026 and UDBapp Pro on September 21, 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.*