I work on the OwnTracks Android client. There is a build (the "OSS" flavour) that doesn't use any of the Google dependencies, and it's currently waiting to get

I work on the OwnTracks Android client. There is a build (the "OSS" flavour) that doesn't use any of the Google dependencies, and it's currently waiting to get merged into the F-Droid repo (https://gitlab.com/fdroid/fdroiddata/-/merge_requests/10698 https://gitlab.com/fdroid/fdroiddata/-/merge_requests/10698). If you can't wait for that, you can grab the APK from the releases on github.