Comparison

RadarPlot vs CA'Sim

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

RadarPlot

Features
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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 target’s 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.

About

CA'Sim

Features
Read full description

Transform your device into a professional radar simulator and collision avoidance training tool. CASim is designed for maritime cadets, deck officers, and navigation enthusiasts who want to master the International Regulations for Preventing Collisions at Sea (COLREGs) through practical application. Bridge the gap between theory and reality. Practice identifying risks on the radar scope, correlating them with visual aspects, and executing the correct maneuvering actions. Key Features: - Realistic Radar Simulator: Experience a fully functional Head-Up radar scope complete with variable range scales, target trails (history), and relative motion vectors. - Tactical Plotting (MoBoard): Integrated digital Maneuvering Board. Plot targets manually or automatically to calculate CPA (Closest Point of Approach), TCPA, and determine the precise course to steer to avoid collisions. - Visual Aspect Visualization: See what the target ship looks like in reality. The app generates 3D models with correct Navigation Lights (Night) and Day Shapes based on the target’s aspect angle. - Restricted Visibility Mode: Simulate fog conditions (Rule 19). Test your ability to navigate using only radar and sound signals. - Sound Signals: Authentic fog signals (Rule 35) are generated automatically based on the vessel type and status (Underway, Stopped, NUC, Anchored, etc.). - Custom Scenarios: Create your own traffic situations with multiple targets, varying speeds, and ship types to challenge your skills. Whether you are preparing for your competency exams or refreshing your skills, CASim provides the most comprehensive simulation environment right in your pocket. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

RadarPlot4 screens
CA'Sim4 screens

Verdict

The call

The clearest difference is update cadence: CA'Sim at weekly against RadarPlot's every 4 months. RadarPlot's advantage is iOS requirement (15.1 vs 18.6). On price, ads, in-app purchases 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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. RadarPlot sells 1 one-off in-app purchase and CA'Sim sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

RadarPlot ships an update every 4 months, CA'Sim weekly. The most recent releases landed on September 18, 2026 and September 9, 2026 respectively.

Scorecard2 real differences Β· 4 level
RadarPlot versus CA'Sim: the parameters behind the verdict, then further details
ParameterRadarPlotCA'Sim
PriceFreeFree
Update frequencyEvery 4 monthsWeekly β€” better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.1 β€” better18.6
Further details β€” not scored
Size58 MB6 MB
Age rating4+4+
DeveloperPaulina PraciakJatuphol Jaturapat

In-app purchases

1 purchases

RadarPlot

One-time1
  • Lifetime Access$14.99
4 purchases

CA'Sim

Subscriptions3
  • Unlock All Features. (1 Month)1 Month trial$0.991 Month
  • Unlock All Features. (3 Months)$2.993 Months
  • Unlock All Features. (1 Year)$7.991 Year
One-time1
  • Lifetime Access$17.99

Questions

Is RadarPlot free?
RadarPlot is free to download, with in-app purchases available.
Is CA'Sim free?
CA'Sim is free to download, with in-app purchases available.
Do RadarPlot or CA'Sim have ads?
Neither RadarPlot nor CA'Sim shows ads.
Which is updated more often, RadarPlot or CA'Sim?
RadarPlot ships an update every 4 months, and CA'Sim weekly. Most recently, RadarPlot was updated on September 18, 2026 and CA'Sim on September 9, 2026.

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