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Best Master alternatives: apps like Master-Nav

8+ similar apps compared and reviewed

4.4 avg rating
5 free apps
Updated November 2026
Master-Nav
Master-Nav
Peterjohn Chisholm
📚 Education
🔍 Reference

Whether you want more options like Master or a completely different take on the same concept, our curated list of 8+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.

Top Alternatives to Master

COLREG 72: Rules of the Road#1

COLREG 72: Rules of the Road by Smirnov Yury

COLREGS, USCG Exam & US Inland
Editor's Choice
📚 Education
4.8(123 ratings)
$3.99
COLREG 72: Rules of the Road screenshot 1
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COLREG 72: Rules of the Road screenshot 4
COLREG 72: Rules of the Road screenshot 5
COLREG 72: Rules of the Road screenshot 6

This app provides comprehensive study materials and practice exams for maritime collision avoidance rules. It covers both International (COLREGs) and US Inland Navigation Rules, with features like interactive quizzes, rule explanations, and timed practice tests. Ideal for preparing for maritime exams and understanding navigation regulations.

ColRegs: Nav Lights & Shapes#2

ColRegs: Nav Lights & Shapes by The Other Hat

for Boating and Sailing
Strong Contender
📚 Education
0.0(0 ratings)
$3.99
ColRegs: Nav Lights & Shapes screenshot 1
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This marine app provides essential quick reference knowledge for seafarers to identify vessels and their activities according to ColRegs. It features over 100 graphics and an interactive quiz to test understanding of navigation lights and day shapes.

Marinus: maritime rules#3

Marinus: maritime rules by Alejandro

COLREGs, IRPCS, IALA & more!
Worth Considering
📚 Education
4.4😞(215 ratings)
FreeAdsIn-App Purchases
Marinus: maritime rules screenshot 1
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This app provides comprehensive guidance on maritime navigation rules and signals. It offers detailed information on flags, lights, sounds, and buoyage systems, along with interactive quizzes and a map feature. Designed for sailors, it ensures safe navigation on any vessel.

What We Love

  • 👍 Great app for learning
  • 👍 Useful study aid
  • 👍 Very helpful for mariners
  • 👍 Good information provided
  • 👍 Easy to use
  • 👍 Smooth to use
  • 👍 Great value for money (free version)
  • 👍 Brilliant to have at sea
  • 👍 Essential tool for students
  • 👍 Good reference material
  • 👍 Convenient and easy to use
  • 👍 Handy for quick reference
  • 👍 Solid training aid
  • 👍 Useful for ROR
  • 👍 Good for beginners
  • 👍 Free version is good
  • 👍 Covers COLREGS and Morse code

Room to Improve

  • 👎 Swamped with ads
  • 👎 Broken app functionality
  • 👎 Subscription model is a money grab
  • 👎 Lifetime pro withdrawn
  • 👎 Scam for changing to subscription
  • 👎 Pro purchase gone
  • 👎 Bad business model
  • 👎 Limited content for price
  • 👎 Full app is not cheap
  • 👎 Too many requests to review
  • 👎 Paid features are annoying
  • 👎 Expensive full edition
  • 👎 Lite version is limited
  • 👎 Nagging pop-ups for full app
  • 👎 Lights not helpful in top-down view
  • 👎 Full version too expensive
  • 👎 Portrait view not ideal
  • 👎 Needs updating
  • 👎 Missing iPhone X screen area
  • 👎 Lost back navigation
  • 👎 Crashing issues

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Prepare for your USCG OUPV examination with this comprehensive learning program. It offers over 1,300 practice questions, instant feedback, and detailed explanations to help you master the Nautical Inland and International Rules of the Road.

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Learn maritime signal flags and the International Code of Signals through engaging levels and challenges. This app offers a structured approach to mastering flag meanings, abbreviations, and communication methods used at sea. It's designed for efficient memorization and progress, suitable for various maritime enthusiasts.

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ColRegs: Rules of the Road
ColRegs: Rules of the Road
ColRegs: Rules of the Road
Essential for all seafarers
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This app provides essential knowledge for seafarers to understand navigation rules and prevent collisions. It features clear illustrations and easy navigation for quick reference, with a test yourself section to check understanding.

Quick reference for navigation rulesOver 100 custom graphicsSound and light signal illustrations
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Seabook Maritime
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This app provides essential maritime information for seafarers and shore-based professionals. It serves as an offline reference for ship stability, navigation, regulations, and marine engineering, aiding in safer seas and cleaner waters.

COLREG regulationsGMDSS informationMarine engineering details
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USCG Exam Prep
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Prepare for U.S. Coast Guard and FCC license exams with a comprehensive study platform. Access thousands of questions, track your progress, and take practice exams offline. Sync your learning across app and web versions.

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