Simple Colregs vs Master
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simple Colregs
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Stay prepared at sea with the Simple Colregs app – your reliable, offline companion for the International Regulations for Preventing Collisions at Sea (COLREGs), including the latest 2016 supplement (Rules 39, 40, 41). 1. Offline Access — No internet needed 2. Audio Guide for Rules 1–19 — Learn by listening 3. Lateral and Maritime Cards Whether you're studying for exams or navigating, this app keeps the COLREGs within easy reach. Clear and simple explanations with audio learning from 1-19. Your on-board reference when every second matters.
Master
Practice maritime navigation rules and buoyage systems with this app. It helps you identify knowledge gaps and track your progress in mastering essential regulations for mariners.
- USCG Navigation Rules practice
- IALA Maritime Buoyage System tests
- Knowledge gap identification
- Progress tracking
- Developed by Master Mariner
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Master-Nav: COLREGS IALA Tests is a free practice app developed by a Master Mariner with 30 years of seagoing experience. Test your knowledge of the USCG Navigation Rules and IALA Maritime Buoyage System — the regulations every mariner needs to know. A straightforward way to find out where you stand, identify gaps in your knowledge and track your progress over time. Master COLREGS & IALA — the easy way.
Screenshots
Verdict
The clearest difference is update cadence: Master at fortnightly against Simple Colregs's every 2 months. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Simple Colregs ships an update every 2 months, Master fortnightly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.
| Parameter | Simple Colregs | Master |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone | iPhone |
| Requires iOS | 18.5 | 17.6 — better |
| Further details — not scored | ||
| Size | 20 MB | 305 MB |
| Age rating | 4+ | 4+ |
| Developer | Angad C | Peterjohn Chisholm |
In-app purchases
Simple Colregs
No in-app purchases
Master
No in-app purchases
