CK vs UDBapp Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
UDBapp Pro
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.
- Animated drill views with music
- Individual coordinate sheets
- Live coordinate tracking
- Sheet music integration
- Attendance tracking
- Tap ID for performer management
- Offline mode
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Get the app used by hundreds of thousands of marchers, directors, and teachers around the world. Features for Students • Watch the drill animation while listening to the music from any perspective (performer or director). • View your individual coordinate sheet for sets in a song or counts in a set. • Follow your drill count by count with live updating coordinates. • UDB view shows curved and straight-line path information for previous and next sets. • Student leadership can access everyone’s drill information. • Learn and clean drill in seconds after it's been exported from Pyware by the designer. Features for Directors and Staff • Tap any performer to view coordinate and UDB view information. • Change field perspective (performer/director). • Easily add/delete/edit drill files in your ensemble's account directly from your app. • Learn and clean drill in seconds after it's been exported from Pyware by the designer. Sheet Music Integration • One tap access to Beam • Import music and scores from cloud services like Dropbox and Google Drive or take a picture. • Sync the drill and music with drill tabs. • Annotate music with integrated icons and helpful tools. Differentiators • Phone layout designed for one handed use • Easily find your midway points and yard line crossing counts • Easily switch between custom views Tap ID • Tap ID allows directors to see the performer labels that your students have selected. Simply tap on a performer's dot while viewing the drill to see their name and photo. Multiple students can select a single performer label so directors can easily see and manage alternates, shadows, and primary performers. Calendar + Attendance • See your full rehearsal and performance schedule, check-in to events, and track attendance throughout the season. • Use Live Attendance to get a real-time view of who is at rehearsal and who is not. Offline Mode • Offline mode allows a director to restrict access to Ultimate Drill Book if selected users are connected to the internet. If not activated, all users will be able to access Ultimate Drill Book even if connected to a WiFi or cellular connection.
Screenshots
Verdict
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.
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.
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.
| Parameter | CK | UDBapp Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 1.4 (18 ratings) | 4.8 (2.3K ratings) — better |
| Positive reviews | 0.0% of reviews | 85.3% of reviews — better |
| Number of ratings | 18 | 2.3K — better |
| Update frequency | Every 9 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 16 |
| Further details — not scored | ||
| Size | 2 MB | 29 MB |
| Age rating | 4+ | 9+ |
| Developer | ContentKeeper Technologies | Ultimate Drill Book |
Customer experience
CK
UDBapp Pro
Bugs and requests
CK
Not enough reviews yet to summarise bugs or requests.
UDBapp Pro
Reported bugs
4 issues- Drill files disappearing after updates
- Attendance tracking issues
- Crashes when adding notes
- Drill visualization jumping between sets
Requested features
5 requests- Apple Watch integration
- Ability to create custom drill designs
- Improved note-taking functionality
- Offline drill playback
- Tempo adjustment for drill and music
In-app purchases
CK
No in-app purchases
UDBapp Pro
No in-app purchases
Questions
Is CK free?
Is UDBapp Pro free?
Which has better reviews, CK or UDBapp Pro?
Do CK or UDBapp Pro have ads?
Which is updated more often, CK or UDBapp Pro?
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