Marine Ranger vs RadarPlot
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Marine Ranger
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BECOME A MARINE RANGER! Share your findings with others, learn more about the marine environment and the interaction of marine mammals with fishermen and boaters. Contribute to the scientific research and conservation efforts of the Mediterranean sea. LEARN ABOUT MARINE MAMMALS The Mediterranean is home to 12 and and an occasional destination to 17 more marine mammal species. Become an expert at recognising them at sea, learn how to identify their different behaviours and how you should behave to make the most of the encounter without disturbing the animals. CONTRIBUTE TO SCIENTIFIC RESEARCH There are only so many marine biologists and researchers in the Mediterranean sea, with only so many boats. With your help, and the help of your friends you invite to download this app, you can contribute significantly to better understanding of the Mediterranean sea, the whales, dolphins and other animals who inhabit it.
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 β’ Record target range and bearing observations β’ Plot multiple radar targets β’ Use a North-Up stabilized radar display β’ Adjust plotting intervals and range scales β’ Zoom and pan without affecting calculations CALCULATE CPA AND TARGET MOTION β’ Automatically construct the Relative Motion Line β’ Calculate CPA, TCPA and relative speed β’ Determine the targetβs true course and speed β’ Visualize own-ship and target-motion vectors β’ Practice the standard 6-minute plotting method PLAN COLLISION-AVOIDANCE MANEUVERS β’ Set a required minimum passing distance β’ Calculate course-only and speed-only solutions β’ Select the maneuver execution point β’ Display the Advanced Relative Motion Line β’ 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 in-app purchases: Marine Ranger at none against RadarPlot's 1. On price, update cadence, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. RadarPlot sells 1 one-off in-app purchase. Marine Ranger asks for nothing beyond the download.
Marine Ranger ships an update every 2 months, RadarPlot every 4 months. The most recent releases landed on September 26, 2026 and October 5, 2026 respectively.
| Parameter | Marine Ranger | RadarPlot |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months β better | Every 4 months |
| Ads | No | No |
| In-app purchases | No β better | Yes |
| Devices | iPhone | iPhone, iPod β better |
| Requires iOS | 16.0 | 15.1 β better |
| Further details β not scored | ||
| Size | 62 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | Blue World Institute | Paulina Praciak |
In-app purchases
Marine Ranger
No in-app purchases
RadarPlot
- Lifetime Access$14.99









