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Celestial Nav

Celestial Nav

Modern Celestial Navigation

10 ratings
15 reviews
🔍 Reference
🗺️ Navigation
Free
In-App Purchases

Details

Released
November 2, 2021
Updated
November 2, 2026

Features

Developer

Skytip LLC
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Celestial Nav screenshot #1 for iPhone
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Celestial Nav screenshot #10 for iPhone
iphone
ipad
🧾$0.99 - $24.99
In-App Purchase↘︎
⭐15
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📝3+ tags
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❓8 answered
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📦~ in 3 weeks
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About

This tool provides comprehensive celestial navigation calculations, including sight reductions and almanac data. It offers both basic free features for daytime sun navigation and advanced pro features for day and night use with a wide range of celestial bodies. The app is designed for offline functionality and ease of use.

✓Celestial navigational computations
✓Perpetual Almanac (1600-3000)
✓Offline functionality
✓High accuracy sight reductions
✓Sight planning and reduction tools
✓Save LOP calculations
✓Map display for saved LOPs
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What's New in Celestial Nav

3.5.1

November 2, 2026

This version brings more advanced features to the MAP view (PRO version only). We added a scale (in nm) as well as a coordinate overlay to the map based on user feedback. This tool allows visual identification of a possible LOP intersection as well as an approximation of a midpoint between several LOPs. Bug fix: - Our apparent altitude calculation bug snuck back in and had to be squashed again. Index Error(IE) is again properly applied to calculate H(o)

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Subscriptions & In-App Purchases

PRO Version

1 Month PRO license for Celestial Navigation

$1.991 Month
How to cancel Celestial Nav subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Highly recommended!

The best one out there and so much of it is free! Amazing tool that works for my sight reductions - accurate, intuitive, and packed with useful features.
It’s perfect for comparing results in class during training exercises and makes learning celestial navigation more engaging. An ideal app for a modern approach to sextant use.
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APAv8r Popps

Response from developer

We appreciate the positive review and work hard to keep improving.

THANK YOU!!!

This is a terrific program. I am relearning celestial navigation and Celestial Navigation is helping me catch mistakes. I still have my nav books from too many years ago and have run the program to compare my 1960s stubby pencil math solutions.After a couple of days I upgraded to the PRO version to record LOPs and map plots. I’ve used two other CELNAV apps and found them frustrating to enter data. Celestial Nav data entry is straight forward. Glad I found it!
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SStormyWX

Feed back

Its good to use but i don’t know why the app is closed back to home screen after opening about 5 seconds.
SSoemyint123@

Response from developer

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

Great!

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.
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CCapnLes

Response from developer

Thank you for your candid feedback! We strive to make this the perfect tool for fun, practice and professional users.

No CE Check

No CE Check
SStevesnowon

Response from developer

We would love to support and improve based on user feedback. What do you mean by “CE check”?

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FAQ

What is Celestial Nav?

Celestial Nav is a modern celestial navigation app offering a simple yet powerful tool for users. It provides celestial navigational computations, an internally stored perpetual Almanac, and is designed to be offline ready.

Does Celestial Nav have ads?

No, Celestial Nav does not contain advertisements. The app is free to use with basic features and offers advanced features through an in-app purchase.

What are the Pro features in Celestial Nav?

The Pro version of Celestial Nav includes advanced day and night celestial navigation, almanac data for 65 navigational bodies, map display for saved LOPs, and support for metric and imperial units. It also offers unrestricted moon references.

How accurate are Celestial Nav's calculations?

Celestial Nav uses a high accuracy sight reduction algorithm and computations by the USNO algorithm in the Nautical Almanac. Computational variables are displayed for accuracy and validation.

Can I use Celestial Nav offline?

Yes, Celestial Nav is designed to be offline ready and functional without the need for other external tools. This includes its perpetual Almanac and sight reduction capabilities.

What devices support Celestial Nav?

Celestial Nav is supported on iPhone and iPad devices, making it accessible for a wide range of Apple users.

How often is Celestial Nav updated?

Celestial Nav was last updated on November 2, 2026, indicating a recent update. The app is developed by Skytip LLC.

What is the age rating for Celestial Nav?

Celestial Nav has an age rating of +4, making it suitable for a broad audience of users.