Compare software

Cartes du Ciel (SkyChart)SkySafari
Free

Free software under the GPL.

 Paid

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

Windows, macOS, Linux Android, iOS
  • Uses many star and deep-sky catalogues
  • Shows planets, asteroids and comets
  • Telescope control over ASCOM Alpaca, INDI and Celestron WiFi
  • Plate solving to place your own astrophotos on the chart
  • The number of settings can overwhelm casual stargazers
  • Interface is functional rather than polished
  • 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 License not stated
No account needed Not stated if an account is needed
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.