Compare software

SkySafariStellarium
Paid

Commercial app sold through the developer's store and app stores.

 Free

Free and open source under the GPL 2.0, funded by donations and sponsorship.

Android, iOS Windows, macOS, Linux, Android, iOS
  • Telescope control over ASCOM Alpaca, INDI and Celestron WiFi
  • Plate solving to place your own astrophotos on the chart
  • Accurate sky for any location, date and time
  • Simulates the view through binoculars, telescopes and specific eyepieces
  • Paid and closed source
  • Many features are aimed at telescope owners rather than casual stargazers
  • The three-dimensional rendering needs a reasonable graphics card
  • Default catalogues are limited until you download the extra ones
Downloadable app Downloadable app
Closed source Open source
License not stated License: GPL-2.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 2, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.