249+ iOS apps curated and reviewed
Sextant Calculator is the household name in sextant calculator, but it's far from the only option. We track 249+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | $1.00 | — | No | No | Sep 2026 | |
| 2 |  | Free | 2.0★ (3) | No | No | Aug 2026 | |
| 3 |  | Free | 4.9★ (409K) | Yes | No | Sep 2026 | |
| 4 |  | Free | 4.7★ (61K) | No | No | Sep 2026 | |
| 5 |  | Free | 4.6★ (10K) | Yes | Yes | Sep 2026 | |
| 6 |  | Free | 4.6★ (358K) | Yes | Yes | Sep 2026 | |
| 7 |  | Free | 5.0★ (1) | Yes | Yes | Aug 2026 | |
| 8 |  | Free | 4.7★ (579) | Yes | Yes | Sep 2026 |
This tool simplifies celestial navigation calculations for sailors and students. It handles angle and time arithmetic, averages multiple sights, and features a specialized keypad. Offers day and night modes for usability at sea.
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.
This utility app offers a clean and intuitive interface for performing calculations. It prioritizes a user-friendly design with large buttons and a clear display for quick and efficient use.
