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FOSS app to record GPS location, saving it locally?
(discuss.tchncs.de)
F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform. The client makes it easy to browse, install, and keep track of updates on your device.
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OsmAnd, as someone has mentioned. Though, I think it's an extension and you have to activate it and customize the experience. I used GPSlogger in the past, too, when I was in field surveys to upload to my Nextcloud server.