An alternative is the Overland app for iOs [1] or Android [2], logging to compass [3]
Each has features that the other doesn't: OwnTracks can apparently determine a location using iBeacons, whereas Overland can't (though it can detect WiFi networks). Overland lets you record your mode of travel (e.g., driving, cycling, walking), whereas this still seems to be an unimplemented "idea" for OwnTracks [4]. Compass is also designed for tracking a single person, whereas OwnTrack can handle multiple.
Each has features that the other doesn't: OwnTracks can apparently determine a location using iBeacons, whereas Overland can't (though it can detect WiFi networks). Overland lets you record your mode of travel (e.g., driving, cycling, walking), whereas this still seems to be an unimplemented "idea" for OwnTracks [4]. Compass is also designed for tracking a single person, whereas OwnTrack can handle multiple.
[1]: https://github.com/aaronpk/Overland-iOS
[2]: https://github.com/OpenHumans/overland_android
[3]: https://github.com/aaronpk/Compass
[4]: https://owntracks.org/booklet/ideas/