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 | Oct 2026 | |
| 2 |  | Free | 4.9★ (410K) | Yes | No | Nov 2026 | |
| 3 |  | Free | 4.7★ (61K) | No | No | Nov 2026 | |
| 4 |  | Free | 4.6★ (7) | No | No | Oct 2026 | |
| 5 |  | Free | — | No | No | Aug 2026 | |
| 6 |  | Free | 4.5★ (126K) | Yes | Yes | Nov 2026 | |
| 7 |  | Free | 4.8★ (874) | No | No | Nov 2026 | |
| 8 |  | Free | 4.9★ (34K) | Yes | Yes | Nov 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 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.
This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.
