Celestial navigation application with
- perpetual almanac
- star finder chart, with animation
- calculation of lines of position ( intercept/delta )
- celestial object data
- meridian passage calculation
- running fix support
- astronomical position calculations, with two or more star observations
- Hipparchus 150 star catalog

Program can be set to use device's sensors (gyro, compass)
to position the star finder chart in real time.
Capture celestial object approximate altitude.

Note that you still need a marine sextant to do celestial navigation,
but the phone sensors may be used for training.

Software for iPhone and iPad, with the same features.
e-book with manual and celestial navigation tutorial.

What’s New

Version 3.0

- interface redesigned ( dark look )
- Help hints to guide navigation workflow
- e-Book with celnav theory and app usage. Now open with external PDF viewer

Ratings and Reviews

1.0 out of 5
2 Ratings

2 Ratings

Otherwise happy with app. ,

Interesting but needs work.

Not intuitive, star map jumps when trying to take sight, star names don’t register correctly upon taking sight.

ArjunaUser ,

Worked great till IOS9

The app was great and worked beautifully till IOS9. So far it just quits right away as soon as the app is started. I hope it is fixed soon with an update.

App Privacy

The developer, Omar reis, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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