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Satellite vs GPSTest: catalog facts
Satellite	GPSTest
Free Free and open source under the GPL.	Free Free and open source under the Apache-2.0 license, with no ads.
Linux	Android
Shows data from several satellite systems Records tracks to standard GPX files	Real-time GNSS and SBAS satellite information Supports dual-frequency GNSS
Needs a device with a GNSS receiver providing NMEA data Linux only	Android only A diagnostic tool rather than a navigation app
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-only	License: Apache-2.0
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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