Comparison

Radar Plotting vs Nautical Calculator Pro

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

Head to head
About

Radar Plotting

This app offers advanced radar plotting for maritime navigation. It allows users to calculate critical encounter data, plan maneuvers, and analyze complex scenarios with interactive visualizations. Designed for training and decision support, it aids in understanding vessel interactions.

Highlights
  • Kinematic calculations (CPA/TCPA, aspect)
  • True and relative speed estimation
  • Evasive maneuver planning with COLREG guidance
  • Rescue and escape scenario planning
  • Double-target analysis
  • Current and drift estimation
  • Interactive radar canvas with playback
Features
Read full description

Radar Plotting provides advanced radar-plotting capabilities for iPhone and iPad. Compute CPA/TCPA, estimate true motion, plan evasive/rescue/escape manoeuvres, and analyse two-target encounters — all visualised on an interactive radar sheet. Highlights: - Precise kinematic calculations (CPA/TCPA, aspect, true & relative speed) - Evasive manoeuvres with COLREG guidance - Rescue & escape planning, including scenarios with faster vessels - Double-target handling - Current/drift estimation - Interactive canvas with adjustable scales and animated trajectory playback - Import/export via QR code and PDF report generation Safety note: This app is for training and decision support. It does not replace certified navigational equipment or official procedures. Always follow COLREG and local/company rules.

About

Nautical Calculator Pro

This app provides comprehensive tools for marine navigation, including real-time ship movement, route planning, and advanced calculations for sailing and maneuvering. It also offers learning resources on maritime regulations and signaling.

Highlights
  • Real-Time Ship Movement
  • Route Planning
  • Sailing Calculations (Mercator, Great Circle)
  • Collision Avoidance Maneuvers
  • Wind and Current Calculations
  • Nautical Almanac
  • COLREG Rules and Marine Signaling
Features
Read full description

The application to assist in solving the most important marine problems. - For Marine Navigation: +Real-Time Ship Movement; +Route Plan; + Mercator Sailing; + Greate Circle Sailing; + Meridional parts; + Plane Sailing; + Traverse Sailing. + Wheel over; + Current and wind sailing; + Allowing for current and wind; + Calculate true wind and apparent wind on a ship running; + Nautical Almanac; + Two Lop Fix; + Three Lop Fix; + Correcting marine sextant altitude of sun and stars; + Probability Distribution Function; + Standard Deviation and Error; + Offline GPS; - For Maneuvering : -Avoid collisions ; -Change of station in cases: + with time specified; + with speed specified; + with course specified; + Course and speed of another ship; + Closest point of approach(CPA); + Ability to reach another ship going faster; + Close or open to another ship in cases : - as quickly as possible; - on a constant bearing; - with time specified; + Maneuver to intercept a target ship going faster; + Maneuver to intercept ahead a target ship; + Close to another ship as close as possible; +Keep watch for a target ship within a range of distances; +Maneuvering with added calculating of turning; +Bearing and distance to another ship in advance; - For Learning : +International regulations for preventing collisions at sea (COLREG) include Rules; Lights signs; Shapes signs and Sounds signs; + Marine signalizations include Flag signaling; Morse signaling by hand; Morse code; + Maritime buoyage system; + Unit Conversion for Maritime; + Glossary of Marine Navigation; +Maritime Theory; +Global Lighthouses System; author Vu Cong The. vucongthe@gmail.com - Các tính toán hàng hải và vận động tàu, bao gồm : +Dịch chuyển của tàu theo thời gian thật; +Lập kế hoạch hành trình; +Hành trình theo hải đồ Mercator; +Hành trình theo cung vòng lớn; +Vĩ độ tiến; +Dự tính vị trí tàu một hướng và nhiều hướng; +Tính và đè độ dạt gió dòng; +Tính toán lượn vòng của tàu; +Tính toán gió thực và gió biểu kiến trên tàu đang hành trình; +Lịch thiên văn hàng hải; +Phương pháp hai đường vị trí. +Hiệu chỉnh độ cao mặt trời và sao đo bằng sextant hàng hải; +Tính hàm phân phối xác suất; +Các tính toán bổ trợ; +Tính sai số chuẩn và độ lệch chuẩn; +Hướng đi, vận tốc của tàu mục tiêu; +Tránh va; +Các thông số ở điểm tiếp cận CPA; +Các thông số trận địa với thời gian hoặc khoảng cách cho trước; + Xác định khả năng tiếp cận tàu mục tiêu có vận tốc lớn hơn; +Thay đổi khoảng cách tới một tàu khác với : - Thời gian ngắn nhất; - Thời gian cho trước. - Phương vị không đổi; +Vận động cắt mũi hoặc lái một tàu mục tiêu có vận tốc lớn hơn; +Vận động cắt mũi một tàu mục tiêu; +Tiếp cận một tàu khác ở cự ly ngắn nhất; +Tính các yếu tố trận địa với thời gian hoặc cự ly cho trước; +Thay đổi trận địa trong các trường hợp: -với thời gian cho trước; -với vận tốc cho trước; -với hướng đi cho trước; +Vận động trong dải khoảng cách; +Tính toán lượn vòng trong vận động; -Tra cứu hàng hải bao gồm : + Qui tắc tránh va quốc tế (COLREG) : Nội dung các điều luật, Tín hiệu đèn, Dấu hiệu, Tín hiệu âm thanh; +Thông hiệu hàng hải : Thông tin cờ hiệu, thông tin cờ tay, mã morse; +Hệ thống phao tiêu hàng hải; +Thuật ngữ Tiếng Anh Hàng hải; +Chuyển đổi đơn vị trong hàng hải; +Lý thuyết hàng hải; +Hệ thống hải đăng toàn cầu; +Hệ thống các cảng container bận rộn nhất; Các giao diện hiển thị hai ngôn ngữ : Tiếng Anh và tiếng Việt Tác giả : Vũ Công Thế. vucongthe@gmail.com

Screenshots

Radar Plotting3 screens
Nautical Calculator Pro4 screens

Verdict

The call

Radar Plotting and Nautical Calculator Pro both sit at 5.0 stars, but that hides the real split: 100% of Nautical Calculator Pro's written reviews are positive against 50% of Radar Plotting's. Nautical Calculator Pro also leads on update cadence (fortnightly vs every 5 months). Radar Plotting's advantage is ads (none vs shown) and price ($7.99 vs $14.99). On rating, ratings volume, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Radar Plotting costs $7.99 and Nautical Calculator Pro $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Radar Plotting against 5.0 for Nautical Calculator Pro. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 50% of Radar Plotting's written reviews are positive against 100% of Nautical Calculator Pro's.

UpkeepUpdate frequency

Radar Plotting ships an update every 5 months, Nautical Calculator Pro fortnightly. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.

Scorecard5 real differences · 5 level
Radar Plotting versus Nautical Calculator Pro: the parameters behind the verdict, then further details
ParameterRadar PlottingNautical Calculator Pro
Price$7.99 — better$14.99
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings11
Update frequencyEvery 5 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better17.0
Further details — not scored
Size17 MB67 MB
Age rating4+4+
DeveloperGiacomo GabrieleThe Vu Cong

Customer experience

Radar Plotting

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Nautical Calculator Pro

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Radar Plotting

No in-app purchases

None

Nautical Calculator Pro

No in-app purchases

Questions

Is Radar Plotting free?
Radar Plotting costs $7.99, with no in-app purchases.
Is Nautical Calculator Pro free?
Nautical Calculator Pro costs $14.99, with no in-app purchases.
Which has better reviews, Radar Plotting or Nautical Calculator Pro?
Radar Plotting and Nautical Calculator Pro are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Radar Plotting or Nautical Calculator Pro have ads?
Nautical Calculator Pro shows ads; Radar Plotting does not.
Which is updated more often, Radar Plotting or Nautical Calculator Pro?
Radar Plotting ships an update every 5 months, and Nautical Calculator Pro fortnightly. Most recently, Radar Plotting was updated on September 21, 2026 and Nautical Calculator Pro on September 23, 2026.

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