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Stellarium vs WorldWide Telescope: catalog facts
Stellarium	WorldWide Telescope
Free Free and open source under the GPL 2.0, funded by donations and sponsorship.	Free Free and open source.
Windows, macOS, Linux, Android, iOS	Web
Accurate sky for any location, date and time Simulates the view through binoculars, telescopes and specific eyepieces	Large collection of sky imagery in the browser Guided tours with narration and slides
The three-dimensional rendering needs a reasonable graphics card Default catalogues are limited until you download the extra ones	Needs a fast internet connection Interface can feel dense for newcomers
Downloadable app	Web application
Open source	Open source
License: GPL-2.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Needs internet
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 2, 2026

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