ACR Product App vs Rule Master
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ACR Product App
Access Class B AIS and Emergency PLB/EPIRB data. View live AIS targets, check distress beacon details, and monitor battery status via NFC or WiFi. Configure your AIS with vessel information.
- View live AIS targets
- Check PLB/EPIRB distress beacon details
- Monitor beacon operation time and battery condition via NFC
- Configure Class B AIS with vessel details via WiFi
- Access ACR CB2 WiFi connection for AIS data
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The ACR App allows easy access to Class B AIS and Emergency PLB/EPIRB information. Live AIS targets can be displayed as well as Test and Ownership details for Distress Beacons. NFC (Near Field Communication) allows access to ResQLink AIS PLB and GlobalFix V5 details where operation time, Battery condition and test results can be easily checked and displayed on a mobile device. The use of NFC ensures that maximum battery capacity can be ensured giving you confidence that a Beacon will give maximum performance when required in an emergency situation. WiFi connection to the ACR CB2 gives access to live AIS target data along with status and performance details. Initial configuration with vessel details for the CB2 Class B AIS is also carried out via the WiFi connection.
Rule Master
Master maritime navigation rules with this comprehensive quiz app. It offers extensive question banks, custom filters, and detailed progress tracking for both new and experienced sailors. Generate custom exams and access a digital handbook for efficient learning and exam preparation.
- 10,000+ question-answer combinations
- Custom question filters
- Fill-in-the-blank questions
- Offline capability
- Exam PDF generation
- Digital Navigation Rules handbook
- Progress tracking and statistics
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The most advanced, modern, and competitive Rules of the Road quiz application on the iOS App Store! This Navigation Rules quiz application is a must-have for new and experienced sailors, alike. This complete Rules of the Road toolbox is the most effective way to build and maintain proficiency, so you can spend less time preparing for your next USCG Navigation Rules examination. Track your progress like never before, and use our advanced question filters and rule proficiency statistics for efficient, targeted studying. Are you an instructor? Generate and print beautiful, custom-filtered COLREG examinations in seconds with our advanced exam PDF generation algorithm. Are you an experienced mariner? There is always more to learn! Rule Master provides 100+ hand-selected, fill-in-the-blank questions optimized to refine your mastery of the Rules of the Road. Mastery of these verbatim COLREG excerpts allows for intelligent verbal communication of the rules — especially useful for students undergoing rigorous training at the USN Mariner Skills Training Command. - 10,000+ question-answer combinations - Advanced, custom question filters for targeted studying - 100+ hand-selected, fill-in-the-blank questions for experienced Mariners - Full offline capability - Unlimited exam PDF generation and printing - Full, digital Navigation Rules handbook for quick reference - In-depth progress tracking and statistics This COLREG application's abbreviated question bank -- tediously hand-scrubbed and optimized by an experienced USN Surface Warfare Officer -- is coupled with a custom algorithm that generates 10,000+ unique question-answer combinations specifically designed to more effectively teach and examine student knowledge while simultaneously exposing students to the confusing vernacular commonly found in the infamous USCG Rules of the Road question bank.
Screenshots
Verdict
The clearest difference is price: ACR Product App at Free against Rule Master's $9.99. ACR Product App also leads on device support (3 vs 1). Rule Master's advantage is rating (4.8 vs 1.7) and review sentiment (43% vs 22%). On update cadence, ads, in-app purchases and iOS requirement 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
ACR Product App is free to download; Rule Master costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Rule Master holds the better App Store score, 4.8 against 1.7. That said, the two scores are not equally well evidenced: Rule Master has 297 ratings behind it against 36, so its average is the more settled of the two. Written reviews point the same way: 22% of ACR Product App's written reviews are positive against 43% of Rule Master's.
ACR Product App ships an update every 2 months, Rule Master every 3 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.
| Parameter | ACR Product App | Rule Master |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 1.7 (36 ratings) | 4.8 (297 ratings) — better |
| Positive reviews | 21.7% of reviews | 42.9% of reviews — better |
| Number of ratings | 36 | 297 — better |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Best chart rank | — | #29 — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 113 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Ocean Signal Limited | Universal Queue LLC |
Customer experience
ACR Product App
Rule Master
Bugs and requests
ACR Product App
Not enough reviews yet to summarise bugs or requests.
Rule Master
Reported bugs
5 issues- Questions disappear off the bottom of the screen
- Diagrams are too small to identify vessels
- Some questions have character limits over the margin
- App doesn't display quiz and verbatim in a usable manner
- Incomplete questions showing three dots (...)
Requested features
4 requests- Link relevant COLREG rule when answering correctly and incorrectly
- Expand subjects to include chemistry or history
- Improvements in tracking missed questions for training
- Display full question text when it's cut off
In-app purchases
ACR Product App
No in-app purchases
Rule Master
No in-app purchases
Questions
Is ACR Product App free?
Is Rule Master free?
Which has better reviews, ACR Product App or Rule Master?
Do ACR Product App or Rule Master have ads?
Which is updated more often, ACR Product App or Rule Master?
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