Master vs Official MCA guidance
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Master
Learn maritime navigation rules with an interactive system designed for effective retention. This app breaks down complex regulations into manageable sections with visual aids and mnemonics. It revisits incorrect answers and provides instant graphical feedback, making the learning process intuitive and efficient.
- Interactive learning system
- Step-by-step rule guidance
- Mnemonics and memory aids
- Interactive visuals
- Graphical feedback on answers
- Practice section with progress tracking
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Master-Nav is a progressive COLREGS learning system developed by a Master Mariner. The COLREGS are notoriously difficult to learn and retain — Master-Nav makes it significantly easier through an interactive system built around how your brain actually works. Instead of guessing through random question banks, Master-Nav guides you step by step through every rule from start to finish. Wrong answers are revisited until the rules stick — properly. Complex regulations are broken down into learnable chunks — bite-sized sections supported by mnemonics, memory aids and interactive visuals designed around how the brain actually retains information. Every incorrect answer is shown graphically alongside the correct one — immediately clear, no confusion. And with a single tap, the relevant COLREGS rule is accessible from any question at any time. Master-Nav covers COLREGS Parts A to D — General, Steering & Sailing, Lights & Shapes and Sound & Light Signals — plus Annex IV Distress Signals. Over 1000 questions in multiple formats, with a dedicated Practice Section that tracks right, wrong and unanswered so you always know where to focus. COLREGS — the easy way.
Official MCA guidance
This app offers practical guidance for maritime professionals, focusing on safe practices and well-being at sea. It includes checklists for fishing vessel inspections and live updates for the latest regulations.
- Wellbeing at sea guidance
- Behaving safely at sea
- Fishing vessel checklists
- Faceted search
- Live updates
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The Official MCA Guidance app provides useful, practical information to those working at sea. It also includes fishing industry checklists to prepare for vessel inspections. The Maritime and Coastguard Agency (MCA) is the UK’s national regulator to prevent the loss of life on the coast and at sea. It produces legislation and guidance on maritime matters and provides certification to ships and seafarers. Created in partnership with the Stationery Office (TSO), the app is primarily for those working at sea who seek practical guidance on how to behave safely and how to maintain good physical and mental health, as well as providing accessible fishing vessel guidance. What does the app include? Guidance for seafarers Seafarers are part of an incredible, unique industry, but this can come with periods of pressure and prolonged isolation, sometimes with limited services. It is essential seafarers are supported during their time at sea. • wellbeing at sea - practical step-by-step guidance on how to achieve and maintain good physical and mental health while at work • behaving safely - looks at the risks of working at sea and how to manage these on a personal level Fishing vessel guidance and checklists Useful advice and checklists to ensure inspections or surveys are successful. • how to prepare for your next MCA visit • fishing vessel aide memoire under 15M checklist • fishing vessel aide memoire 15-24M checklist • fishing vessel aide memoire 24M and over checklist The app also includes: • faceted search so users can find guidance and content more quickly • easily browse and purchase key MCA titles • automatic live updates for the latest guidance and content Disclaimer: this app is not intended as a substitute for the medical advice of physicians. The reader must not take any decisions based solely on the content of this app and should seek independent medical advice relating to their health with respect to any symptoms that may require diagnosis or medical attention.
Screenshots
Verdict
The clearest difference is price: Official MCA guidance at Free against Master's $1.99. Master's advantage is update cadence (fortnightly vs every 2 months). On review sentiment, ads, in-app purchases and device support 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
Official MCA guidance is free to download; Master costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Master ships an update fortnightly, Official MCA guidance every 2 months. The most recent releases landed on October 30, 2026 and October 20, 2026 respectively.
| Parameter | Master | Official MCA guidance |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.8 (100 ratings) — better | — |
| Positive reviews | 96.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 100 — better | — |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 117 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | Peterjohn Chisholm | TSO (The Stationery Office) |
Customer experience
Master
Official MCA guidance
In-app purchases
Master
No in-app purchases
Official MCA guidance
No in-app purchases
Questions
Is Master free?
Is Official MCA guidance free?
Do Master or Official MCA guidance have ads?
Which is updated more often, Master or Official MCA guidance?
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