Best Nautical Calculator Preview alternatives: apps like Nautical Calculator Preview

8+ similar apps compared and reviewed

4.6 avg rating
7 free apps
Updated November 2026

Nautical Calculator Preview is great, but it's not the only option. Explore 8+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.

Top Alternatives to Nautical Calculator Preview

3.2(5 ratings)
Free
Celestial Navigator screenshot 1
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This app assists with celestial navigation training by providing a perpetual almanac, star finder chart with animation, and tools for calculating lines of position and meridian passages. It can utilize device sensors for real-time chart positioning, though a marine sextant is still required for actual navigation.

Celestial Nav#2

Celestial Nav by Skytip LLC

Modern Celestial Navigation
Strong Contender
🗺️ Navigation
4.3(10 ratings)
FreeIn-App Purchases
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This tool provides comprehensive celestial navigation calculations, including sight reductions and almanac data. It offers both basic free features for daytime sun navigation and advanced pro features for day and night use with a wide range of celestial bodies. The app is designed for offline functionality and ease of use.

Binnacle: Nautical Calculator#3

Binnacle: Nautical Calculator by Danylo Budylkin

NAVTEX, celestial & true wind
Worth Considering
🗺️ Navigation
5.0(1 ratings)
Free
Binnacle: Nautical Calculator screenshot 1
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This navigation app provides tools for maritime professionals and sailing enthusiasts. It offers features like true wind calculation, celestial navigation, ETA estimation, logbook management, and port search. Stay informed with real-time NavArea warnings for safer voyages.

More apps like Nautical Calculator Preview

4
Navigation Almanac
Navigation Almanac
Navigation Almanac
Celestial navigation offline
Free

This app provides a comprehensive offline celestial navigation toolkit. It calculates celestial body positions, sunrise/set times, and sky charts. It also offers tools for compass error correction and position fixing, all without requiring an internet connection.

Offline celestial almanac dataSight reduction calculationsRise, set, and twilight times
🗺️ Navigation
(3)
free
5
Navigation Marine
Navigation Marine
Navigation Marine
Essential marine tools
Free

This marine navigation tool offers essential features for sailors and boaters, including a speedometer, position tracking, waypoint management, and distance measurement. It's designed to assist with sailing and anchoring.

Speedometer (knots, mph, km/h)Course over GroundPosition tracking
🗺️ Navigation
(0)
ad-supported
6
CamSextant
CamSextant
CamSextant
Sextant & Celestial Navigation
Free

This app functions as a celestial navigation tool, enabling users to take altitude measurements of celestial bodies using their phone. It provides real-time star and planet identification, automatic astronomical position calculations, and a perpetual nautical almanac.

Celestial object altitude measurementReal-time star and planet identificationAutomatic astronomical position calculation
🗺️ Navigation
(8)
free
7
SEAiq Pilot
SEAiq Pilot
SEAiq Pilot
#1 App for Pro Marine Pilots
Free

This navigation app provides advanced charting and real-time vessel data for professional marine pilots. It supports various chart formats and external NMEA/AIS devices, offering features like predicted vessel display and docking aids. A free trial is available, with an in-app purchase for permanent access.

S-57, S-63, iENC, BSB/KAP chart supportExternal NMEA/AIS over WiFiPredicted vessel display
🗺️ Navigation
(453)
free with in-app purchases
8
EZ Nautical Almanac
EZ Nautical Almanac
EZ Nautical Almanac
ezNA
$9.99

Access 100 years of nautical almanac data digitally, from 1960 to 2059. This app offers enhanced navigation features like instant page access, highlighting, and zoom, supporting celestial navigation activities offline.

100 years of almanac data (1960-2059)Instant page accessData highlighting
🗺️ Navigation
(5)
paid