I am tracking my location now for nearly a decade to create some Google Timeline alternative. Therefore I used OwnTracks before but wanted to have more control

I am tracking my location now for nearly a decade to create some Google Timeline alternative. Therefore I used OwnTracks before but wanted to have more control over the tracking settings and how data is synced to my own backend (e.g. only every 15min and only with WiFi). It supports syncing the location data to a selfhosted backend but can also be used purely as offline GPS tracker and has some other features (like geozones) which improve battery efficiency