# Celestial Nav — Modern Celestial Navigation > Offline celestial navigation tool with almanac and sight reduction computations. (iPhone/iPad app by Skytip LLC.) - Source: https://appshunter.io/ios/app/celestial-nav/id1569880598 (this page in markdown: same URL + `.md`) - Developer: [Skytip LLC](https://appshunter.io/developer/1569880600) - Category: Navigation, Reference - Price: Free with in-app purchases - Rating: 4.30/5 from 10 App Store ratings · 12 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 20 MB - Languages: American English - Released: 2021-11-02 - Data updated: 2026-08-24 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/celestial-nav/id1569880598/reviews.md ## What is Celestial Nav? We believe celestial navigation is an amazing skill and develop Celestial Nav to offer a simple, yet powerful and all encompassing app for our users. Celestial Nav is an easy to use, all-in-one tool which offers: • Celestial navigational computations for your device • Simple toolbar menu for quick access • Internally stored perpetual Almanac • Offline ready and functional without the need for other external tools • Quick and easy capture celestial observation data • High accuracy sight reductions • Star reference tables SIGHT PLANNING • Local Hour Angle (LHA) for Aries • Star tables sorted by name, magnitude, declination, and SHA • Sunrise, sunset, twilight, and location reference • Moon phase reference SIGHT REDUCTION • High accuracy sight reduction algorithm • Perpetual Almanac offering accurate data for years 1600 - 3000 • Almanac data for Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn • Detailed Almanac data for 58 navigational stars • Assumed Position (AP) for any user defined position • Line of Position (LOP) intercept data for accurate course and speed adjustments • Computational variables displayed for accuracy and validation CELESTIAL FIX • Computations by USNO algorithm in the Nautical Almanac • Save all your LOP in an easy reference table BASIC VERSION Free daytime celestial navigation tools using the sun: • Unlimited sextant sight reduction calculations • Sight reduction to a line of position using the sun • Perpetual almanac for the sun • Advanced sight corrections for index error, eye height, temperature, and pressure • Support for upper and lower limb reference • Star Table with navigational references • Detailed Sun references • Limited Moon references PRO FEATURES (IN-APP PURCHASE) Advanced Day & Night Celestial Navigation includes all BASIC features plus: • Almanac data for 65 navigational bodies for years 1600 through 3000 • Map display for saved LOPs • View intercepts with course and speed corrections • Metric and imperial unit support with automatic conversions • Support for coordinate entries in different formats (H° M’ S” or Decimals) • Save all your LOP calculations for future reference • Save user preferences and settings • Unrestricted moon references • Almanac and algorithmic models for 65 navigational bodies: • Sun, Moon, Mercury, Venus, Mars, Jupiter, and Saturn • 58 navigational stars Supported stars: Acamar, Achernar, Acrux, Adhara, Aldebaran, Alioth, Alkaid, Alnair, Alnilam, Alphard, Alphecca, Alpheratz, Altair, Ankaa, Antares, Arcturus, Atria, Avior, Bellatrix, Betelgeuse, Canopus, Capella, Deneb, Denebola, Diphda, Dubhe, Elnath, Eltanin, Enif, Fomalhaut, Gacrux, Gienah, Hadar, Hamal, Kaus Australis, Kochab, Markab, Menkar, Menkent, Miaplacidus, Mirfak, Nunki, Peacock, Polaris, Pollux, Procyon, Rasalhague, Regulus, Rigel, Rigil Kent., Sabik, Schedar, Shaula, Sirius, Spica, Suhail, Vega, Zubengenubi REFERENCES Sight reductions and celestial calculations use various internationally accepted references for the most accurate results: • Jean Meeus - Astronomical Algorithms • US Naval Observatory (USNO) Almanac and Algorithms • Hipparcos New Astrometric Catalog, Published 2007 • ELP2000-85 SUBSCRIPTION TERMS Celestial Nav is free to download and the basic features free to use. A paid upgrade to the PRO version provides access to premium features and additional tools. We may offer trial subscriptions that give limited time access to all PRO features and premium content for the duration of the trial period. Trial subscriptions automatically expire and the app will revert back to the Basic version thereafter. No data is lost but access and use of premium features will no longer be available. ## Key features - Celestial navigational computations - Offline perpetual almanac - Quick celestial observation data capture - High accuracy sight reductions - Sight planning and reduction tools - Celestial fix computations ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | PRO Version | $1.99 | per month | | PRO Version | $9.99 | per year | | PRO Version | $7.99 | per 6 months | **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | 7 Day Trial License | $0.99 | one-time | | PRO Version Lifetime | $24.99 | one-time | | 30 Day Trial License | $2.99 | one-time | ## Recent user reviews (10 of 12) All indexed reviews: https://appshunter.io/ios/app/celestial-nav/id1569880598/reviews.md ### 3/5 — Feed back *2026-07-17* Its good to use but i don’t know why the app is closed back to home screen after opening about 5 seconds. **Developer response:** Thank you for your feedback. This is the first report of this and we are unable to replicate this behavior. Please contact us via email so we can make assist directly. From the app select More - About - Contact Us ### 5/5 — Great! *2026-06-05* Broke out my Sextant and started playing with it again. This app makes it fun and easy to see how well you're shooting. If you use your GPS is your DR and you're not too far away or close than you know your site is accurate. This app makes it fun and easy to use again. I don't feel like I'm cheating, but I do feel like using my Sextant again. **Developer response:** Thank you for your candid feedback! We strive to make this the perfect tool for fun, practice and professional users. ### 1/5 — Невозможно использовать *2024-08-09* Перезагружается через несколько секунд после начала ввода данных **Developer response:** Our testing indicates this appears to be an isolated issue possibly due to previously saved data under an old version. Please try to delete the app completely then reinstall and contact us via support email for further troubleshooting if necessary. ### 5/5 — Best out there right now *2024-03-17* Developer fixes bugs and this app is actively supported. The best I can say is very simple: It works as advertised! I sail extensively and use this app regularly. Sailingwithgrace.com **Developer response:** We take customer feedback to heart and appreciate your suggestions as well as your patience getting this right. You were tremendously helpful pointing us to a bug we could fix with the latest release. Thank you for your kind words and enjoy CelestialNav at sea and on land. ### 1/5 — Broken *2024-03-05* Wrote a bad review, developer responded asking for a chance to address the issue. After multiple emails for days there is no response from the develiper… this app does not work after upgrading to pro and paying money!!! The Developer never responds to emails. Apple gave me a refund. **Developer response:** This is certainly not what we expect from our app. If you provide us the specific details we will figure out where the issue maybe. Our latest version fixed a bug for iPads not properly handling a popup alert message. Give us a chance to address this and email support@skytip.net for a quick response. ### 1/5 — Broken *2024-03-01* App does not work after upgrading to pro and paying money!!! ### 5/5 — Celestial Nav *2023-08-27* This is one of the better Celestial Navigation tools for iOS in the App Store. I have tried many including the de facto expensive Star Pilot but while many of them have a wealth of functionality under the hood, they are designed for experienced navigators with very little thought gone into the user interface. Some of them are akin to entering data into a database and really do very little for people just starting out with a sextant. Celestial Nav has a clear easy to navigate user interface that thankfully has arguably the most intuitive data entry systems of the majority of other apps. It is also extremely powerful and as accurate as Star Pilot and I would have no qualms about using it for navigation in any situation. In fact the user interface makes it easier to get results quicker than some of the other offerings in the App Store. Finally the backend support from the developers is superb with email questions answered within 12 hours. Considering the relative low cost I would place this app at the top of my Nav list. Highly recommended and 5 stars for an extremely well thought out accurate product. **Developer response:** We are humbled receiving such an amazing review and positive feedback. Our focus has been on offering a highly accurate tool, as much as simplicity in the interface. With very limited resources but a passion in this field we are happy to hear that we can provide you with a useful tool. Thank you for entrusting our app for your celestial navigation. ### 5/5 — Good app, responsive developer *2023-05-26* I'm updating my review again! This is a solid app that I've found very useful for learning about celestial navigation. I previously found a couple of bugs in the app and reported them. The developer addressed then immediately, which is really great to see. I recommend this app for its general usefulness as well as the responsiveness of the developer. **Developer response:** Thank you for the updated review. We sincerely appreciate raising awareness to some bugs that we were able to fix immediately. We hope you continue to enjoy our app and look forward to future feedback and suggestions. ### 1/5 — Not working *2022-03-03* I paid for the seven day trial. The app seemed to work on the first day when taking sun and moon shots, but the Hc calculations did not seem to include either pub. 229 or pub. 249 corrections, the LOPs were not drawn and old LOPs could not be deleted. When testing with Arcturus on the second day the Body selector could not be be changed to a star and the app kept crashing. This may have been caused by the Star Info page being empty. Even after rebooting my iPad, I could no longer select any Body. There seems to be no manual whatsoever to be found for this app. **Developer response:** We apologize for your experience but have been unable to replicate the issue you describe. Please contact us directly via the About page in the app and we’ll resolve this to highlight all the great features of this tool. ### 5/5 — Nice features and accuracy! *2022-01-10* Sweet app! Best one I have seeing for accuracy and lots of additional features 🤓. Developer gets back to questions pretty quick too. **Developer response:** Thank you for your positive review. We're happy you enjoy our app. ## Frequently asked questions about Celestial Nav ### What is Celestial Nav? Celestial Nav is a modern, all-in-one tool for celestial navigation. It offers computations for celestial bodies, sight reductions, and an offline perpetual almanac, making it functional without external tools. ### Does Celestial Nav have ads? No, Celestial Nav does not contain advertisements. The app is free to use with optional in-app purchases for Pro features. ### What celestial bodies are included in Celestial Nav? The Pro version of Celestial Nav includes almanac data for 65 navigational bodies, including the Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, and 58 navigational stars. The basic version offers limited moon references. ### How accurate are Celestial Nav's computations? Celestial Nav uses high accuracy sight reduction algorithms and computations by the USNO algorithm in the Nautical Almanac, ensuring precise data for course and speed adjustments. ### Can I use Celestial Nav offline? Yes, Celestial Nav is designed to be offline ready and functional without the need for other external tools. Its perpetual almanac is internally stored. ### What are the Pro features in Celestial Nav? The Pro features, available via in-app purchase, include expanded almanac data for 65 bodies, map display for saved LOPs, metric and imperial unit support, and unrestricted moon references. ### What devices does Celestial Nav support? Celestial Nav is supported on iPhone, iPad, and iPod devices, indicated by its availability on these platforms. ### How often is Celestial Nav updated? Celestial Nav was last updated on December 27, 2025, with version 3.4. This indicates a recent update, suggesting ongoing development and maintenance. ## Version history (last 5 releases) ### 3.4.1 — 2026-08-21 Thanks to user feedback, we added a scale to the map display. Additional bug fixes and background tweaks include: - restored proper display of magnitude for stars and planets - Proper terminology and calculation of Index Error (IE) to match a sextant setting - Dip correction formatting ### 3.4 — 2025-12-27 Thanks to user feedback, we fixed the localization issues experienced in some countries with the input and display of decimals and various number formatting. ### 3.3 — 2025-09-12 CelestialNav is ready for iOS 26. This release includes various behind the scene tweaks: - Improved result accuracy by a few more decimals for various celestial calculations and variables ### 3.2.3 — 2025-05-14 We fixed a user reported bug that displayed incorrect sunrise/sunset times when local noon falls on a different date. ### 3.2.2 — 2025-02-12 Bugfix: Crash after alert display on iOS18+ Tooltips and help features continue to be expanded. Various titles and labels display definitions and further guidance when tapped. ## Apps similar to Celestial Nav | App | Rating | Price | Category | | --- | --- | --- | --- | | [Star Tracker - Night Sky Map](https://appshunter.io/ios/app/star-tracker-night-sky-map/id1639492546) | 4.2 (126) | Free | Navigation | | [Spyglass](https://appshunter.io/ios/app/spyglass/id332639548) | 4.7 (3,864) | Free | Navigation | | [GPS Anti Spoof Pro](https://appshunter.io/ios/app/gps-anti-spoof-pro/id1379926231) | 5.0 (7) | $19.99 | Navigation | | [EZ Celestial Navigation](https://appshunter.io/ios/app/ez-celestial-navigation/id1547239240) | 4.9 (25) | $29.99 | Navigation | | [Perpetual Nautical Almanac](https://appshunter.io/ios/app/perpetual-nautical-almanac/id1483007345) | 5.0 (1) | $6.99 | Navigation | | [EZ Lunars](https://appshunter.io/ios/app/ez-lunars/id1607908384) | 5.0 (1) | $24.99 | Navigation | ## More apps by Skytip LLC - [Tech Dive](https://appshunter.io/ios/app/tech-dive/id6483004689) All apps by Skytip LLC: https://appshunter.io/developer/1569880600 ## Related topics [celestial navigation](https://appshunter.io/ios/topics/celestial-navigation) · [perpetual nautical almanac](https://appshunter.io/ios/topics/perpetual-nautical-almanac) · [ez celestial navigation](https://appshunter.io/ios/topics/ez-celestial-navigation) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*