Master-Nav

Name: Master-Nav
Price: 1.99 USD
Rating: 4.7 (91 reviews)
Author: Peterjohn Chisholm

By: Peterjohn Chisholm

NAV RULES - the easy way!

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

(91)

Version:

1.48 Last updated: 2026-05-31

Version code:

886355063

Creation date:

2022-01-08

Compatible devices:

Size:

113.11MB

Price:

1.99

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-06

Compare stats and ranking:

Ranking

# 154,015 ▼ 138

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.

by SW*****, 2024-11-10

I couldn’t just read COLREGS and make it stick to my brain for sheee, thank god for this app and the creators of this dynamic way of memorizing rule by rule. Because if your going to be navigating a multi million-billion dollar ship make sure you have this memorized to the T!