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Star Walk 2 vs Look4Sat: catalog facts
Star Walk 2	Look4Sat
Freemium A free version is offered on Google Play; paid options are not detailed in the research.	Free Free and open source under the GPL-3.0.
Android, iOS	Android
Real-time sky map based on your location Tracks satellites such as the ISS and Starlink	Over 9000 active satellites from Celestrak and SatNOGS Search by NORAD catalog number or name
Mobile only, no desktop version Closed source	Android only Predictions depend on accurate location data
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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