Peterjohn Chisholm
For professional mariners and maritime students preparing for nautical qualification examinations.
Master-Nav: COLREGS IALA Tests
Snapshot
Who is Peterjohn Chisholm?
Simplifying complex maritime regulations for professional mariners through structured, interactive learning modules. Providing accessible tools to master COLREGs and IALA buoyage systems.
Target audience
Portfolio
Free 2Last updated
Master-Nav: COLREGS IALA Tests
vM_N 5.3
7mo ago
Publisher DNA
What defines Peterjohn Chisholm?
Publisher DNA
Primary focus
Maritime education and regulatory compliance training
Scale
indie
Target audience
Professional mariners and maritime students preparing for nautical qualification examinations.
Origin
Developed by a Master Mariner with 30 years of seagoing experience to address the difficulty of learning complex maritime regulations.
Signature Patterns
- •Focus on niche maritime regulatory education
- •Content-first approach using mnemonics and interactive visuals
- •Step-by-step curriculum design for complex rule sets
- •Minimalist monetization strategy with free test tools and paid specialized modules
Portfolio momentum
The publisher has maintained an intense development pace with 18 releases in the last 6 months, ensuring all apps remain current with recent updates.
Portfolio
What does Peterjohn Chisholm ship?
Apps
3 apps analysed
Single-market publisher, every app ships only to United States.
Based on 1 of 3 apps with localized market data, more coverage rolling in as scans complete · last scanned .
Americas (1)
- United States1 / 1
Core markets (1/1 apps)
Rivals
Who does Peterjohn Chisholm compete with?
The rivals identified
Nemeses(2)
Both apps target maritime professionals studying COLREGS, but Master-Nav uses an interactive curriculum while Navigation Rules relies on a static reference manual.
Both apps target maritime students preparing for nautical qualifications, creating direct competition for study time and exam preparation resources.
Contenders(15)
Both apps target maritime students and professionals, with direct overlap in IALA Maritime Buoyage System training content.
Both apps target maritime students preparing for nautical exams, creating direct competition for study time and wallet share within the maritime education category.
Offers visual training for collision avoidance, acting as a specialized visual aid for the COLREGS concepts taught in Master-Nav.
Both applications target maritime students preparing for licensing exams, creating direct competition for study time and user attention within the nautical certification space.
Both target maritime students preparing for COLREGS exams by offering adaptive review systems and integrated rule references.
Both apps target maritime students preparing for certification exams. Navigo provides broad nautical license preparation, overlapping with Master-Nav's specific focus on COLREGS mastery.
Both apps target maritime students preparing for IALA buoyage system exams, creating direct competition for study time and wallet share.
Both apps target maritime students with paid study aids for IALA buoyage systems at an identical $0.99 price point.
Both apps target maritime navigation education with interactive learning tools, though Master-Nav focuses on COLREGS while Sailing Quiz HD covers broader topics like meteorology and GMDSS.
Both apps target professional mariners preparing for maritime examinations. Master-Nav focuses specifically on COLREGS mastery, while License to Sail provides tailored study plans for USCG license exams.
Both apps target maritime students preparing for nautical qualifications, creating direct competition for the same professional education audience.
Both apps target maritime students and professionals requiring exam preparation, creating direct competition for study time and wallet share within the maritime education category.
Both apps target maritime students and professionals with free educational tools. They compete for study time by offering interactive quizzes and progress tracking for navigation exams.
Both apps target maritime navigation learners and professionals, with overlapping functionality in visual identification of IALA buoyage systems.
Both apps target mariners and maritime students with free educational tools designed for memorizing maritime codes. Master-Nav focuses on COLREGS, while Maritime Academy covers International Code of Signals flags.
Same space(8)
Focuses on a specific subset of maritime navigation training, buoyage systems, which serves as a visual supplement to Master-Nav.
This app serves the same certification-seeking student base but relies on static document storage instead of interactive learning.
This app functions as an adjacent tool for maritime professionals that focuses on navigation utility rather than exam preparation.
Provides practical navigation tools and calculators for sailors, complementing the theoretical learning approach of Master-Nav.
Acts as a broad reference library for maritime topics, serving as a companion to the focused COLREGS curriculum in Master-Nav.
This app provides navigation and AIS awareness for professionals, serving as a practical tool for those who have already passed the exams Master-Nav teaches.
This app targets the same maritime student demographic but focuses on broad licensing exams rather than specific buoyage systems.
Targets the same professional certification audience as Master-Nav but focuses on specific USCG exam modules.
New entrants(2)
This app competes for the exam-prep time of the same maritime student audience by focusing on specific rule-of-the-road knowledge.
This app targets the same student demographic but shifts focus from buoyage recognition to oral examination verbal explanation skills.
The Analyst's Read
The bottom line on Peterjohn Chisholm
Bottom line
Master-Nav is a highly focused, utility-driven project that successfully serves a professional niche through deep domain expertise. Its commitment to regular updates and user-driven content refinement provides a stable, high-quality resource for the maritime training sector.
Frequently asked questions
How many apps does Peterjohn Chisholm publish?
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What fed this analysis
- Apps analyzed:
- 3
- With full intel:
- 0
- With overview:
- 3
- Website scraped:
- yes
- Social presence:
- no