Comparison

CK vs UDBapp Pro

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Secure internet browsing
  • Identity-based reporting
  • Policy-based filtering
  • CIPA compliance
  • Global web access control
  • MDM deployment
Read full description

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.

About

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.

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
Read full description

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

CK1 screens
UDBapp Pro4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
CK versus UDBapp Pro: the parameters behind the verdict, then further details
ParameterCKUDBapp Pro
PriceFreeFree
Rating1.4 (18 ratings)4.8 (2.3K ratings) — better
Positive reviews0.0% of reviews85.3% of reviews — better
Number of ratings182.3K — better
Update frequencyEvery 9 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better16
Further details — not scored
Size2 MB29 MB
Age rating4+9+
DeveloperContentKeeper TechnologiesUltimate Drill Book

Customer experience

CK

All ratings18 ratings
Positive11.1%
Neutral0.0%
Negative88.9%
Written reviews5 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

UDBapp Pro

All ratings2,313 ratings
Positive94.8%
Neutral0.7%
Negative4.5%
Written reviews177 reviews
Positive85.3%
Neutral2.8%
Negative11.9%

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

None

CK

No in-app purchases

None

UDBapp Pro

No in-app purchases

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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