Just to let others know about a little quirk I stumbled into today. My phone upgraded itself yesterday to Android 10 and it has an extea location service setting : Allow all the time, Deny, and now has Allow only while using the app.
Bike Tracker needs the Location permission set to "Allow all the time".
If set to "allow only while using the app", the location service is stopped as soon as the screen times out, and you get no guidance (as I found out earlier !)