Free online version
Free
Runs in a desktop browser with WebGL; listed browser versions include Chrome 57, Firefox 52 and Safari 10.1
Checked 30 Sep 2026
Runs in a desktop browser with WebGL; listed browser versions include Chrome 57, Firefox 52 and Safari 10.1
Checked 30 Sep 2026
iOS and Android · optional in-app purchases · sky pointing
Checked 15 Oct 2026
browser-based · desktop WebGL required
Checked 15 Oct 2026
Windows and Mac · fullscreen · offline mode · 300 MB free disk space minimum
Checked 30 Sep 2026
Windows and Mac · offline mode · fullscreen · higher graphics
Checked 15 Oct 2026