Compare software

Sky MapSkySafari
Free

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

 Paid

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

Android Android, iOS
  • Real-time identification using the phone's sensors
  • Long history, maintained by the original developers
  • Telescope control over ASCOM Alpaca, INDI and Celestron WiFi
  • Plate solving to place your own astrophotos on the chart
  • The classic interface looks dated, as the developers acknowledge
  • Accuracy depends on the phone's compass and sensors
  • Paid and closed source
  • Many features are aimed at telescope owners rather than casual stargazers
Downloadable app Downloadable app
Open source Closed source
License: GPL-3.0-or-later License not stated
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 2, 2026

Checked October 2, 2026

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