Calculate precise celestial positions for navigation from 1900 to 2050. Get real-time data on the Sun, Moon, planets, and stars, including rise/set times and atmospheric corrections.
Perpetual Nautical Almanac by RPA Technologies






243+ iOS apps curated and reviewed
From beginner-friendly picks to power-user tools, our perpetual nautical almanac list covers 243+ iPhone apps updated through September 2026. Compare ratings, prices, and screenshots in one place.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 | $6.99 | 5.0★ (1) | No | No | Aug 2026 | ||
| 2 | $9.99 | 5.0★ (5) | No | No | Aug 2026 | ||
| 3 | Free | 5.0★ (2) | No | No | Sep 2026 | ||
| 4 | $8.99 | 5.0★ (3) | No | No | Aug 2026 | ||
| 5 | $49.99 | 4.9★ (8) | No | No | Aug 2026 | ||
| 6 | $3.99 | 5.0★ (4) | No | No | Sep 2026 | ||
| 7 | Free | 4.7★ (48) | No | No | Sep 2026 | ||
| 8 | Free | — | No | No | Aug 2026 |






Calculate precise celestial positions for navigation from 1900 to 2050. Get real-time data on the Sun, Moon, planets, and stars, including rise/set times and atmospheric corrections.






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.





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.