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Stellarium vs Star Walk 2: catalog facts
Stellarium	Star Walk 2
Free Free and open source under the GPL 2.0, funded by donations and sponsorship.	Freemium A free version is offered on Google Play; paid options are not detailed in the research.
Windows, macOS, Linux, Android, iOS	Android, iOS
Accurate sky for any location, date and time Simulates the view through binoculars, telescopes and specific eyepieces	Real-time sky map based on your location Tracks satellites such as the ISS and Starlink
The three-dimensional rendering needs a reasonable graphics card Default catalogues are limited until you download the extra ones	Mobile only, no desktop version Closed source
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
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.