GPSTest.
By Sean J. Barbeau
GPSTest is Sean J. Barbeau's open-source Android app for inspecting a phone's satellite navigation. Where the hardware and Android 8 or newer allow it, the app reads dual-frequency signals from GPS, GLONASS, Galileo, BeiDou, QZSS, and NavIC, plus several regional augmentation systems. The repository also explains how to send those measurements to the system log. The readme does not state a monetary price.
The F7 Insight
GPSTest is a field instrument rather than a map: it tells you which satellites the phone can actually see. For F7, that makes it a useful Android utility from a single maintainer, with a launcher icon that sits inside the Apache-licensed repository.
A closer look.
- 01
Inspect GNSS signals, including dual-frequency data when the phone and Android version support it.
- 02
Read GPS, GLONASS, Galileo, BeiDou, QZSS, and NavIC constellations.
- 03
Show augmentation systems such as WAAS, EGNOS, GAGAN, MSAS, and SouthPAN.
- 04
Log GNSS measurements for later accuracy checks, as described in the project docs.
- 05
Install the Google Play build or the separate F-Droid osmdroid build linked in the readme.
Sources & credits
Verified against the sources below. Features, pricing, and availability may change; check the creator’s current information before installing or buying.
- Official readme: GNSS constellations, logging, Play and F-Droid links; no price statedChecked 12 Oct 2026
- Apache-2.0 for the repository, with no icon exception in that fileChecked 12 Oct 2026
Artwork acknowledgments
GPSTest launcher icon from icons/ic_launcher-playstore.png. Repository LICENSE is Apache-2.0 and copyrights The Android Open Source Project and Sean J. Barbeau. No root NOTICE file was present. Image used unmodified.