.. not quite done

Tested on 6S+ 64GB.
Limited to ~20 items then you have to delete or subscribe. It looses data (misses some stops), doesnt allow editing the displayed location to the actual location on the map. The support website doesnt exist.
It has a lot of potential, but maybe thats the best that can be done with the limitations of iPhone sensors.

Ftcnet about GPSPlus: Work, Miletracker log, v2.27