Calculate times of sunrise, sunset, moonrise, moonset and more for your location at any given date.

The following data is calculated:

- Sunrise
- Solar noon
- Sunset
- Day length
- Equation of time
- Declination
- Civil twilight (Dawn/Dusk)
- Nautical twilight (Dawn/Dusk)
- Astronomical twilight (Dawn/Dusk)
- Azimuth at sunrise and sunset
- Altitude during solar noon
- Sun track
- Date and time of Seasons (Spring, Summer, Fall, Winter)
- Solstice and Equinox dates
- Date and time of next solar eclipse

- Moonrise
- Moon transit
- Moonset
- Moon phase
- Distance
- Declination
- Date and time of next new moon
- Date and time of next full moon
- Azimuth at moonrise and moonset
- Altitude during moon transit
- Moon track
- Date and time of next lunar eclipse

Some information for the current day can also be viewed in the notification center.

To specify the location of interest either get the position from the built-in GPS or Wifi receiver or select a city from a database with over 30,000 cities in over 200 countries.

What's New

Version 6.4

- Fixed an issue in lat/lon to MGRS coordinate conversion
- Fixed: When changing the "Always use UTC" settings option from with in global iOS settings app the times are not updated properly
- Fixed: The time zone field was some times not visible when editing a place from the places list.
- New: Saved locations are accessible via the local search index
- Updated timezone database

Ratings and Reviews

4.9 out of 5
413 Ratings
413 Ratings

Good app...except...

Just wants Pizza landscape orientation and when “adding a place” through finding on map. App crashes if “layer select” on bottom right of map is used. Seems there is issue with the interface between your app and the iOS map app. portrait orientation attempting to adjust map settings/layers it closes the map...not the whole app like in landscape. Hope this helps you fix issue.

Developer Response

With the latest version you can tilt the map using the standard two-finger-swipe-up gesture.

Also, when returning to the app, it defaults to the location that was selected the last time you used the app. To go to the current location you have to explicitly tell the app to do so by tapping on the GPS symbol.

Still Great!


This is a fantastic app — as it always has been — it works very well with the latest (as of December 2017) iPhone OS. I especially like the customizable alarms which you can set for any number of celestial events.
Keep up the good work guys!

would be 5, if they ever responded


It's actually closer to five stars — my only issue is that they never respond to my questions.

Also: unless they’re using different calculations than most astronomers, their LQM and FQM times [in “alarms”] are often off, by at least half a day.


Volker Vocking
36.3 MB
Requires iOS 9.3 or later. Compatible with iPhone, iPad, and iPod touch.
English, French, German, Italian, Russian, Spanish
Age Rating
Rated 4+
© 2018 Volker Voecking Software Engineering


  • Family Sharing

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

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