Master-Nav
iOS app by Peterjohn Chisholm. Education · Peterjohn Chisholm
- Store rating
- 4.74 / 5
- Store rating count
- 96
- Download price
- 1.99 USD
- In-app purchases
- Unknown
- Version
- 1.50
- Listing last refreshed
- 2026-09-09
View the original store listing
Store description excerpt
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.
Review coverage
AppRill has captured 0 reviews for this app. This is a collected sample, separate from the store rating count. Latest review capture: Not captured yet.
Recent captured chart positions
| Country | Chart | Category | Rank | Captured |
|---|---|---|---|---|
| CA | top-paid | Education | 34 | 2026-09-09 |
| ES | top-paid | Education | 18 | 2026-09-09 |
| FR | top-paid | Education | 97 | 2026-09-09 |
| FR | top-paid | Education | 64 | 2026-09-08 |
| GB | top-paid | Education | 54 | 2026-09-08 |
Chart position, rating count and review coverage do not establish downloads, revenue or profit. Understand the differences.