Tracking client with low battery energy consumption for phonetrack

The app is really great! Is there any recomendation for a client app on an android device?

I would like to run the location service permanently in the background, but it should of course not consume too much battery energy. It is sufficient to have network location service at known places (at home), but GPS when driving or hiking.

I tried µlogger and traccar. Their energy consumption is low, but they do not regularly send data. so not quite reliable. I contacted the producer of the app, lets see if they have further info.

There is a very nice docu on gitlab. I am wondering why I have not checked it earlier:

It is recommended to download PhoneTrack (for android) via the F-Droid store.
Great job!

Only thing I am missing is the mozilla location service.