CoordCalc vs Nautical Calculator Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CoordCalc
Calculate distances and bearings between two points on Earth using manual coordinates or the built-in map. It can also determine a final position based on an initial point, distance, and bearing. Supports various units and coordinate formats.
- Calculate distance and bearing between two points
- Determine final position from initial point, distance, and bearing
- Manual coordinate input or map-based selection
- Supports multiple distance units (miles, km, nautical miles, etc.)
- Converts between decimal degrees, minutes, and seconds
- Uses GPS for current location
- Saves previous positions
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A coordinate utility app that calculates the distance and initial/final bearings between two points on Earth specified either manually by latitude and longitude or automatically using the built-in map. It can also calculate a final position given an initial position, distance, and bearing. ################################ Limited time sale, get it now before the price increase to $4.99 ################################ The final distance can be calculated in miles, kilometers, nautical miles, yards, meters, or feet. Coordinates can be specified in and converted to and from decimal degrees, decimal minutes or decimal seconds. Bearing is returned in degrees true. Uses WGS84 for improved great circle distance calculation accuracy. NOTES: Coordinate messages can only be sent to other CoordCalc users and are available only within the app. Additional Features: -Can use internal GPS to find the lat/lon coordinates of your current location -Can use and drag the points around on the built-in map and get distance/bearing updates continuously. -Shows starting and ending positions on a map -Saves the previous set of starting and ending positions -Maps can display satellite imagery, and labeled roads, highways, cities, oceans, etc. -Can send coordinate messages with short notes to other CoordCalc users. - Built-in HD version for iPad Example use cases: -Navigation tool for aircraft, boats, etc. -Measure walking distance -Finding your exact position in order to mark points of interest/landmarks or meeting places. -Visualize and edit starting and ending locations using the map feature. -Calculate the size of various landmarks if they are visible via satellite. -Save the position of your parked car -Convert coordinates between different formats Checkout the revamped website and video at: www.justintimeapps.com iOS 4.0 Tested A video demo of how to move the pins is located here: http://www.justintimeapps.com/ts.html This pin jumping issue has been fixed in iOS 4.0, but for iOS 3.0 users, the difficulty of this depends alot on your screen protector. If the protector has a rough surface and causes your finger to jump around, the pin will be dropped often. You will get a better response if you move your finger slowly. Although, you should still be able to move a pin from the top to the bottom of the screen within 2 seconds without losing track. In iOS 4.0, this is not an issue.
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.
- 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
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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
Verdict
The clearest difference is review sentiment: Nautical Calculator Pro at 100% against CoordCalc's 40%. Nautical Calculator Pro also leads on rating (5.0 vs 3.0). CoordCalc's advantage is price ($2.99 vs $14.99) and ads (none vs shown). On update cadence, in-app purchases, monetization model 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
CoordCalc costs $2.99 and Nautical Calculator Pro $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Nautical Calculator Pro holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 40% of CoordCalc's written reviews are positive against 100% of Nautical Calculator Pro's.
CoordCalc ships an update monthly, Nautical Calculator Pro fortnightly. The most recent releases landed on August 9, 2026 and September 28, 2026 respectively.
| Parameter | CoordCalc | Nautical Calculator Pro |
|---|---|---|
| Price | $2.99 — better | $14.99 |
| Rating | 3.0 (4 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 40.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 4 — better | 1 |
| Update frequency | Monthly | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #170 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 67 MB |
| Age rating | 4+ | 4+ |
| Developer | Justin Time | The Vu Cong |
Customer experience
CoordCalc
Nautical Calculator Pro
In-app purchases
CoordCalc
No in-app purchases
Nautical Calculator Pro
No in-app purchases
Questions
Is CoordCalc free?
Is Nautical Calculator Pro free?
Which has better reviews, CoordCalc or Nautical Calculator Pro?
Do CoordCalc or Nautical Calculator Pro have ads?
Which is updated more often, CoordCalc or Nautical Calculator Pro?
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