Master-Nav

Name: Master-Nav
Price: 1.99 USD
Rating: 4.7 (94 reviews)
Author: Peterjohn Chisholm

By: Peterjohn Chisholm App

NAV RULES - the easy way!

Overview

Version:

1.50

Last updated: 2026-06-15

Ranking

#153,776 ▼ 3,744

Overall

Features & Capabilities

Master-Nav is a progressive COLREGS learning system developed by a Master Mariner. It breaks complex rules into bite-sized chunks and uses mnemonics and interactive visuals tailored to how the brain retains information.

It guides you step by step through Parts A-D and Annex IV, offering over 1000 questions in multiple formats. Wrong answers are revisited, a dedicated Practice section tracks your right, wrong, and unanswered responses, and you can access the relevant rule from any question with a tap.

User Growth & Download Statistics

App Education

By:

Peterjohn Chisholm

Rating:

4.70

(94) 1 new ratings

Version:

1.50 Last updated: 2026-06-15

Version code:

886956400

Creation date:

2022-01-08

Compatible devices:

Size:

116.99MB

Price:

1.99

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-07-19

Compare stats and ranking:

Ranking

# 153,776 ▼ 3,744

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Peterjohn Chisholm

Apple Apps Store

https://apps.apple.com/us/app/master-nav/id1602390396

Website:

http://master-nav.com/

User Reviews

Great app. Please make distinction of inland/international more apparent. Also, when completing every rule please allow for resetting the progress so that I can go back and “learn.” After I finished everything there was a window congratulating me on getting through everything but when I attempted to reset, the app did not allow it. Thank you.

by Br*****, 2025-01-09

I’m getting ready to start training for my next assignment on a ship. This is an easy to use tool. I was just looking for the COLREGS test questions, but the Review modules are extremely helpful. It’s like having a high level Maritime Rules of the Road instructor on your phone.