GMDSS TRAINER vs RadarPlot
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GMDSS TRAINER
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Master Your FCC Maritime Radio Exams with GMDSS TRAINER. Whether you are pursuing a Marine Radio Operator Permit (MROP) or a specialized GMDSS Radio Maintainer’s License, GMDSS TRAINER is the modern study companion designed to help you pass on your first attempt. Built for professionals and maritime students, this app combines the official FCC question pools with cutting-edge AI guidance to ensure you don’t just memorize answers—you understand the material. EXCLUSIVE: AI-POWERED EXPLANATIONS Stuck on a complex technical question about signal propagation or distress frequencies? Tap the AI icon to receive a detailed, easy-to-understand explanation generated specifically for that question. It’s like having a maritime electronics instructor in your pocket. COMPREHENSIVE FCC COVERAGE Study for all major FCC Commercial Radio Operator license elements, including: • Element 1: Marine Radio Operator Permit (MROP) • Element 3: General Radiotelephone Operator License (GROL) • Element 6: Advanced Radiotelegraph Operator's Certificate • Element 7R: GMDSS Radio Operator's License • Element 8: Ship RADAR Endorsement • Element 9: GMDSS Radio Maintainer's License FLEXIBLE STUDY MODES • Practice Mode: Review questions at your own pace. Use hints to eliminate wrong answers and access AI explanations instantly. • Exam Mode: Simulate the real testing environment with timed sessions and official question counts. See if you can achieve the required 75% passing score under pressure. • Review Mode: Dive deep into your results. Identify weak areas with topic-based performance breakdowns and color-coded answer reviews. KEY FEATURES: • Official Databases: Always up-to-date with the latest FCC question pools. • Detailed Analytics: Track your progress over time with intuitive dashboards and performance history. • Smart Flagging: Bookmark difficult questions to review them later. • Topic Breakdown: See exactly which sub-elements you need to study more. • Modern Interface: A clean, responsive design optimized for study efficiency. Don't leave your maritime career to chance. Download GMDSS TRAINER today and take the first step toward your professional FCC certification.
RadarPlot
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Master radar plotting through practical, interactive exercises. RadarPlot is a professional training tool for maritime cadets, deck officers and navigators learning the 6-minute plotting method, relative motion, CPA calculations and collision-avoidance maneuvers. PRACTICE RADAR PLOTTING • Record target range and bearing observations • Plot multiple radar targets • Use a North-Up stabilized radar display • Adjust plotting intervals and range scales • Zoom and pan without affecting calculations CALCULATE CPA AND TARGET MOTION • Automatically construct the Relative Motion Line • Calculate CPA, TCPA and relative speed • Determine the target’s true course and speed • Visualize own-ship and target-motion vectors • Practice the standard 6-minute plotting method PLAN COLLISION-AVOIDANCE MANEUVERS • Set a required minimum passing distance • Calculate course-only and speed-only solutions • Select the maneuver execution point • Display the Advanced Relative Motion Line • Compare alternative maneuvering decisions BUILT FOR MARITIME TRAINING Use built-in scenarios and answer-reveal tools to learn step by step or practise independently. Ideal for maritime academy students, deck officers preparing for examinations, navigators refreshing manual plotting skills and instructors demonstrating relative-motion geometry. Train smarter. Understand the plot. Make safer decisions.
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Verdict
The clearest difference is update cadence: GMDSS TRAINER at every 6 weeks against RadarPlot's every 4 months. RadarPlot's advantage is iOS requirement (15.1 vs 26.1). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. GMDSS TRAINER sells 1 one-off in-app purchase and RadarPlot sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
GMDSS TRAINER ships an update every 6 weeks, RadarPlot every 4 months. The most recent releases landed on September 6, 2026 and September 18, 2026 respectively.
| Parameter | GMDSS TRAINER | RadarPlot |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, Mac — better | iPhone, iPod |
| Requires iOS | 26.1 | 15.1 — better |
| Further details — not scored | ||
| Size | 19 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | Osprey Applications LLC | Paulina Praciak |
In-app purchases
GMDSS TRAINER
- Full Access$14.99
RadarPlot
- Lifetime Access$14.99





