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Sky MapStellarium
Free

Free and open source under the GPL 3.0 or later licence.

 Free

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

Android Windows, macOS, Linux, Android, iOS
  • Real-time identification using the phone's sensors
  • Long history, maintained by the original developers
  • Accurate sky for any location, date and time
  • Simulates the view through binoculars, telescopes and specific eyepieces
  • The classic interface looks dated, as the developers acknowledge
  • Accuracy depends on the phone's compass and sensors
  • The three-dimensional rendering needs a reasonable graphics card
  • Default catalogues are limited until you download the extra ones
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0-or-later License: GPL-2.0
No account 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.