I modified an open source GPX recording app called Trackbook to turn it into a 24/7 recorder, and I wrote about it here: https://voussoir.net/writing/obsessed_

I modified an open source GPX recording app called Trackbook to turn it into a 24/7 recorder, and I wrote about it here: https://voussoir.net/writing/obsessed_with_gpx https://voussoir.net/writing/obsessed_with_gpx I have a few recent commits in my repository that I haven't put into a versioned APK yet though. The output GPX files can be viewed on the PC with JOSM: https://josm.openstreetmap.de/ https://josm.openstreetmap.de/