CamSextant 4+

Omar reis

    • 4.3 • 6 Ratings
    • Free



CamSextant allows taking altitudes of celestial objects using your phone as a sextant. It is a complete celestial navigation solution, with instrument, almanac and celestial calculator. Point a celestial object and tap the image to capture the altitude and time.

Stars and planets shown on screen in real time. Show constellation names and lines. Identify planets and navigation stars (from Hipparchus 150 catalog). The program can also speak the star names and altitudes (audio).

Astronomic Position (AP) is automatically calculated once you have two sights.
Calculate your astronomical position with less than 10 clicks.
Perpetual nautical almanac using Astronomical Algorithms ( book by J. Meeus).

If you take altitude observations of the same object, the average time/altitude are shown.

You can calibrate the sextant horizon by reading the sea horizon altitude.
Note that the phone is more like a bubble sextant: you don't need the sea horizon to use CamSextant.
Anyway, click [Calibrate] button to save the correction.
Calibration angle is subtracted from raw sensor reading.

If you have a marine sextant at hand, you can edit the altitudes captured by the phone and get serious celestial navigation work done.

Translations for en, es, fr, it, pt ( program texts and voice )

For more information check:

What’s New

Version 2.9

- Constellation names and lines on screen.

Ratings and Reviews

4.3 out of 5
6 Ratings

6 Ratings

John Goodin ,

App Store extremely buggy showing ratings…

There’s something extremely buggy with the App Store. It claims there’s only four ratings on the app and version 1.0 came out over 7 years ago.

Genoafire ,

Excellent app for setting up a telescope mount modeling mask

The app works great for setting up a sky mask for telescope mounts that have absolute encoders when used with modeling software for multipoint mount alignment.

Emergemu ,


Really cool, could be better. Tilting the phone left or right changes the angle measurement. Could use something to make sure the phone is level or correct for this left/right angle.

App Privacy

The developer, Omar reis, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More

More By This Developer

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