47+ iOS apps curated and reviewed
Out of 47+ sextant apps on iOS, 13 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 4.3★ (6) | No | No | May 2026 |
| 2 |  | Free | — | No | No | May 2026 |
| 3 |  | Free | 5.0★ (3) | No | No | May 2026 |
| 4 |  | Free | — | Yes | No | May 2026 |
| 5 |  | Free | 2.0★ (3) | No | No | May 2026 |
| 6 |  | $24.99 | 5.0★ (4) | No | No | May 2026 |
| 7 |  | Free | 5.0★ (1) | No | No | May 2026 |
| 8 |  | Free | 4.8★ (26K) | No | Yes | Jul 2026 |
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.
Simulate using a sextant to measure latitude by sighting the sun and horizon. Includes tools for calculating declination, local solar noon, and basic surveying.
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.
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.
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.
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.
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.
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.
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.
Measure angles and align objects using your device's camera. This tool offers a visual clinometer, distance and height estimation, and a traceable level. It's useful for various alignment and measurement tasks, with adjustable units and zoom for accuracy.
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.
This app provides tools for celestial navigation, offering computations for celestial bodies and sight reductions. It includes an offline perpetual almanac and allows for quick capture of observation data for accurate course adjustments.
Explore a world based on a six-base numbering system. This app offers tools to convert numbers, display time and dates, and perform calculations using seximal. It also includes an Apple Watch app and iOS widgets for convenient access.
Instantly compare observed celestial navigation altitudes with calculated ones. This app helps mariners detect GPS spoofing and functions as a celestial navigation trainer. It automatically includes all necessary corrections for accurate readings.
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.
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.
