Best Sextant Apps

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.

Mark Time

by TrozWare

Free

This app helps celestial navigators accurately record UTC time for sextant sightings. It provides tactile and auditory feedback for precise time stamping, storing readings in five registers. Users can optionally photograph their sextant for later verification.

Sextant — Celestial Nav

Learn to navigate by the stars

$9.99

This app provides a comprehensive celestial navigation toolkit for sailors and enthusiasts. It allows users to navigate using celestial bodies like the sun, moon, planets, and stars, even when GPS is unavailable. The app guides users through taking sextant readings, performing calculations, and plotting positions on a map.

EZ Sextant

Navigate without GPS

$24.99

Navigate open waters using your phone's camera to sight celestial bodies. This app plots lines of position and combines them for an estimated location on a lat/lon grid. It's a powerful tool for offshore navigation without relying on GPS.

Ships Clock Maritime Bells

Maritime Bells & Watch Clock

Free

Experience traditional maritime timekeeping with authentic ship's bell chimes and classic clock faces. Features live weather, moon phases, and a nautical alarm, all without ads or subscriptions.

Celestial Navigator

by Omar reis

Free

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 Navigation

Sextant Sight Reduction

$1.99

This application assists with celestial navigation by performing sextant sight reduction calculations. It displays intermediate numbers for verification and can draw lines of position on a map. Features include a perpetual nautical almanac and a star finder to identify celestial bodies.

SkyView® Lite

Explore the Universe

Free

Identify stars, constellations, satellites, and more by simply pointing your device at the sky. This augmented reality app makes stargazing accessible to everyone, day or night. Explore celestial paths and even travel through time to view the sky on different dates.

Sextant Coffee

Coffee Roasters, Coffee & Tea

Free

Discover exceptional coffees sourced directly from farmers worldwide. This app showcases flavorful beans from Ethiopia, Kenya, Colombia, and more, highlighting the unique origins and tastes of each roast.

EZ Celestial Navigation

ezAlmanacOne

$29.99

This app simplifies celestial navigation using a sextant, providing tools to calculate your position at sea. It offers automated calculations or manual table access, with features for observation archiving and compass checks. Ideal for learning and practicing traditional navigation methods.

Sky Guide

Star gaze constellation finder

Free

Identify stars, constellations, planets, and satellites in real-time by holding your device overhead. Explore celestial bodies with AR overlays, track satellites like the ISS, and travel through time to view past and future astronomical events. Perfect for both novice and experienced stargazers.

Circle Of Position Navigation

Sun Navigation

$8.99

This app provides a backup navigation system using the sun, similar to chart plotter satellite navigation. It requires manual sextant readings and allows users to input times and measurements to display their position on an electronic map, creating a journey track.

Star Pupil

by Richard Craddock

Free

This app helps you practice celestial navigation by showing every step of sight reductions and plotting lines of position. It covers calculations for the Sun, planets, and stars using standard nautical publications.