50
BU Score
Solid
Master-Nav: IALA MBS
✍️ BU Analytics Review
“
Master-Nav: IALA MBS is an iOS app from Peterjohn Chisholm in the News category, currently rated 5.0★ across 1 ratings. Initial signal reads as no scraped reviews yet — judgment based on metadata only.
Our BU Score puts it at 50 — Solid (established niche player). For a News app, that means established niche player.
Track changes month-over-month in the Performance section below — live snapshot history and revenue forecast included.
📊 Performance Tracking LIVE
Loading…
Rating
—
Reviews
—
Forecast Revenue / mo
—
Snapshots tracked
0
since first record
Range:
💰 Forecast Revenue / mo
MODELRevenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 5 of 5 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
| Paid app ($0.00)METRIC | +$2,800 | |
| Excellent rating (5.0★)METRIC | +$2,200 | |
| New app (3 months old)METRIC | −$700 | |
| Single-language (English only)METRIC | −$400 | |
| Pre-traction phase (1 ratings)METRIC | −$300 |
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)
📈 Reviews Growth
LIVECumulative review count from first BU snapshot. Each point = a tracked update.
⭐ Rating Trend
LIVEAverage rating evolution. Updates with each new review batch.
🗓️ Snapshot Timeline
HISTORYEach bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →💾 219 MB🔞 4+📱 iOS 17.6+🔖 v1.1🔄 updated 3mo ago🌐 EN📂 News💰 Paid🚀 Launched 2026 (0y old)
📝 About this app
Master-Nav: IALA MBS makes learning the IALA Maritime Buoyage System clear, visual, and easy. Our goal is to simplify your preparation for maritime qualifications and maximise your success by teaching buoyage the way you actually use it at sea, through recognition, meaning, and correct action.
Master MBS uses interactive visuals, memory aids, and exam ready answer phrases to help you identify marks quickly and explain them correctly. Colours, shapes, topmarks, light characteristics, and chart symbols are taught together, so you build one complete mental picture rather than disconnected facts.
Start with the Learning Section to master each mark step by step, then move into the Practice Section to reinforce what you know under exam style pressure. You will train recognition from multiple angles, including lights only scenarios, daymarks, and chart presentation, with clear explanations that turn common confusion into confident understanding.
With a large bank of questions in varied formats, each supported by clean graphic answers that highlight typical mistakes, Master MBS builds retention through repeated, purposeful practice. The result is faster recall, better accuracy, and stronger oral exam delivery.
Whether you are a cadet building foundations or an experienced mariner refreshing buoyage knowledge for an assessment, Master-Nav: IALA MBS is designed to make IALA MBS feel straightforward, familiar, and practical. Learn it once, recognise it instantly, and answer it properly every time.
Master MBS uses interactive visuals, memory aids, and exam ready answer phrases to help you identify marks quickly and explain them correctly. Colours, shapes, topmarks, light characteristics, and chart symbols are taught together, so you build one complete mental picture rather than disconnected facts.
Start with the Learning Section to master each mark step by step, then move into the Practice Section to reinforce what you know under exam style pressure. You will train recognition from multiple angles, including lights only scenarios, daymarks, and chart presentation, with clear explanations that turn common confusion into confident understanding.
With a large bank of questions in varied formats, each supported by clean graphic answers that highlight typical mistakes, Master MBS builds retention through repeated, purposeful practice. The result is faster recall, better accuracy, and stronger oral exam delivery.
Whether you are a cadet building foundations or an experienced mariner refreshing buoyage knowledge for an assessment, Master-Nav: IALA MBS is designed to make IALA MBS feel straightforward, familiar, and practical. Learn it once, recognise it instantly, and answer it properly every time.
🆕 What's New · v1.1
Interface improvements and bug fixes. Updated layout for better readability, with smoother interactions and overall performance tweaks.
Profile & Insights
Everything we know — and don't — about this app and its company.
Identification
- App name
- Master-Nav: IALA MBS
- Developer
- Peterjohn Chisholm
- Bundle ID
- com.master-nav.iala-mbs
- App Store URL
- Open in App Store
- Category
- News
- Content rating
- 4+
- Languages
- EN
Company
- Website
- master-nav.com
- Tagline
- MASTER-NAV
- Description
- Master-Nav is an App developed by a master mariner, with a game-like format. It makes it easy to understand and memorise the lights, shapes, and definitions of the COLREGs.
- Founded
- Not found
- HQ / Address
- Not found
- Employees
- Not found
- Logo
- OG image
Revenue
- Verified revenue / mo
- Not found
- AI revenue estimate / mo
- Not found
- AI annual estimate
- Not found
- ML model estimate / mo
- $201/mo
- Top-grossing rank
- Outside top 100 in US News
- All-time revenue
- Not found
- Pricing
- Not found
Founder
- Name
- Not found
- X / Twitter
- Not found
- Not found
- GitHub
- Not found
- X followers
- Not found
- Public statements
- Not found
Funding
- Total raised
- Not found
- Last round
- Not found
- Investors
- Not found
- Crunchbase
- Not found
- AngelList
- Not found
Press & Links
- Articles found
- Not found
- Listed on
- Not found
- Blog
- Not found
- Press / News
- Not found
Contacts & Socials
- Socials
- Not found
- Not found
- Phone
- Not found
- Contact page
- Not found
- About page
- https://master-nav.com/about/contact
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.
