186+ iOS apps curated and reviewed
iMariner Celestial Navigation is the household name in imariner celestial navigation, but it's far from the only option. We track 186+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | $26.99 | 4.4★ (10) | No | No | Jul 2026 | |
| 2 |  | $29.99 | 4.9★ (26) | No | No | Sep 2026 | |
| 3 |  | $1.99 | 4.2★ (15) | No | No | Aug 2026 | |
| 4 |  | Free | 4.3★ (10) | No | Yes | Sep 2026 | |
| 5 |  | Free was $0.29 | 4.6★ (2.9K) | No | Yes | Sep 2026 | |
| 6 |  | Free | — | No | Yes | Sep 2026 | |
| 7 |  | Free | 4.5★ (8.5K) | No | Yes | Sep 2026 | |
| 8 |  | Free | 4.3★ (896) | Yes | Yes | Sep 2026 |
This app provides a comprehensive celestial navigation toolkit, including sight reduction, position fixing, and meridian passage calculations. It features an embedded nautical almanac and astronomical computations, eliminating the need for physical tables. Observations can be saved and exported, and the app functions offline.
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.
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.
