The program is useful for astronomers, astrologers, stargazers and everybody interested in celestials, stars and our planet.

– View local and global star time
– Detect your precise offset (up to seconds) from greenwich meridian
– Set up sound chimes for sidereal midnights and hours.
– Configurate when you would like to hear hourly and daily chimes
– Choose different sounds for hourly and daily chimes
– Share your experiences with Facebook, Twitter, iMessage, Mail and others

What’s New

Version 1.2.0

Support for new screen sizes and iOS versions from 10 to 12
+ Works with iPhones 6(s), 7(s), 8(s), Plus, X, XR, XS, XS Max
+ Works on iPad and iPad Pro, including new models
+ Multiple bug fixes

Ratings and Reviews

Allison the Eccentric ,

Doesn't work

I paid $3 for something that doesn't work, it's upsetting. All 3 clocks read 00:00:00. It knows where I am on a map, yet no time shows up. Please fix this.

Developer Response ,

You need to allow the app to access your geolocation. Probably you answered "no" on the initial system question when the app first started. You need to go to the Settings, find "Star Clock" there and allow access to the geolocation.

toadshade ,

Sidereal Time One Hour Behind

I've checked my Sidereal Time with other sources and it appears that Star Clock's clock for Local Sidereal Time is one hour behind. I live in Columbia, South Carolina.



Maxim Orlovsky
6.4 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
This app may use your location even when it isn't open, which can decrease battery life.
© Dr Maxim Orlovsky


  • Family Sharing

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

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