Report updated Apr 19, 2026
Master-Nav
For professional mariners and students preparing for maritime navigation examinations.
Overview · Full Intel report in progress
Master-Nav is an established education app that is completely free. With a 4.5/5 rating from 329 reviews, it shows polarized user reception.
What makes this app unique?
What Does It Look Like?
What Are The Key Features?
Guides users through COLREGS Parts A to D and Annex IV in a logical, sequential order rather than using random question banks.
Utilizes mnemonics and interactive visuals designed to support cognitive retention of complex regulations.
Automatically revisits incorrectly answered questions to ensure mastery of the rules.
Provides one-tap access to the full text of the relevant COLREGS rule from any question screen.
How much does it cost?
Who Built It?
Peterjohn Chisholm
Simplifying complex maritime regulations for professional mariners through structured, interactive learning modules. Providing accessible tools to master COLREGs and IALA buoyage systems.
Portfolio
3
Apps
What other apps does Peterjohn Chisholm make?
Explore the full Peterjohn Chisholm report
Portfolio breakdown, audience, momentum, and every app published by Peterjohn Chisholm.
Analysis in progress, available soon
What do users think recently?
Analysis in progress, available soon
View the full user-sentiment analysis
Mood gauge, ratings & review-volume history, every praise / complaint / request, and sentiment over time.
Analysis in progress, available soon
What is the competitive landscape for Master-Nav?
How's The Education Market?
How does it evolve in the Education market?
Rank progression
52 active rankings tracked — 30-day window
Strategic analysis coming soon
SWOT, key takeaways & outlook
The outtake for Master-Nav
Key Takeaways
Master-Nav simplifies the complex study of maritime navigation rules by applying cognitive learning techniques to the official COLREGS curriculum.
Where Is It Heading?
Trend analysis
Available very soon