Best Sight Calc alternatives: apps like Sight Calc

9+ similar apps compared and reviewed

4.3 avg rating
9 free apps
Updated November 2026

Sight Calc is great, but it's not the only option. Explore 9+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.

Top Alternatives to Sight Calc

3.2(5 ratings)
Free
Celestial Navigator screenshot 1
Celestial Navigator screenshot 2
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Celestial Navigator screenshot 4

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
Celestial Nav screenshot 1
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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.

CamSextant#3

CamSextant by Omar reis

Sextant & Celestial Navigation
Worth Considering
🗺️ Navigation
4.5(8 ratings)
Free
CamSextant screenshot 1
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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.

More apps like Sight Calc

4
Ditch: Boat Navigation
Ditch: Boat Navigation
Ditch: Boat Navigation
Marine GPS, Boat Charts, Maps
Free

Enhance your boating experience with intelligent routing and accurate arrival time predictions. Visualize historical vessel traffic and customize charts for a personalized view of waterways, ensuring safer and more confident journeys on the water.

AI-powered smart routingAccurate ETA predictionsHistorical AIS data visualization
🗺️ Navigation
(23)
free with in-app purchases
5
Navily
Navily
Navily
Your Cruising Guide
Free

This app serves as a comprehensive mobile cruising guide for boaters. It offers a vast database of marinas and anchorages, user-generated reviews and photos, and seamless berth booking across Europe. Connect with other users and marinas through in-app chat and receive real-time warnings.

35,000+ marinas and anchorages350,000+ community photos and commentsEasy berth booking in 700+ European marinas
🗺️ Navigation
(838)
free with in-app purchases
6
Orca: Boat GPS, Charts, Routes
Orca: Boat GPS, Charts, Routes
Orca: Boat GPS, Charts, Routes
GPS Chart Route Sail Powerboat
Free

Access detailed marine charts, intelligent routing, and live vessel tracking for confident navigation on the water. Plan routes with weather forecasts and stay aware of your surroundings with real-time AIS data. Works online and offline for uninterrupted use.

Accurate marine chartsIntelligent sail and engine routingLive AIS vessel tracking
🗺️ Navigation
(412)
free with in-app purchases
7
VesselFinder
VesselFinder
VesselFinder
by AstraPaging Ltd.
Free

Track ships and monitor maritime traffic globally in real-time. Access detailed vessel information, movement history, and predicted routes. Ideal for maritime professionals and enthusiasts alike.

Real-time vessel trackingVessel movement historyPredicted routes and ETAs
🗺️ Navigation
(284)
free with in-app purchases
8
Coordinates – GPS Converter
Coordinates – GPS Converter
Coordinates – GPS Converter
Lat/Lon to UTM, MGRS, and more
Free

This app is a versatile tool for converting and managing geographic coordinates. It supports numerous global formats and datums, allowing users to view, input, and save locations with rich details. Ideal for professionals and outdoor enthusiasts needing precise location data.

Coordinate conversion (UTM, MGRS, Georef, etc.)Batch conversion of multiple coordinatesAdd notes, photos, and media to saved locations
🗺️ Navigation
(6.8K)
free with in-app purchases
9
Savvy Navvy: Boat Navigation
Savvy Navvy: Boat Navigation
Savvy Navvy: Boat Navigation
GPS, Nautical Charts, Boating
Free

This marine navigation app simplifies charts, weather forecasts, tides, GPS tracking, and route planning for boaters. It offers smart routing, real-time GPS, and AIS data to help users make safer, smarter decisions on the water.

Clutter-free marine chartsSmart route planning with ETAsReal-time GPS tracking
🗺️ Navigation
(8.4K)
freemium