Bike tracker gives feedback on how far / fast / etc
I use miles but if you feedback includes "miles left in route" it always gives me the wrong number (in kilometres most likely). Other than that, it's really good.
If you miss a turn it will tell you. It's best then to turn around and it will tell you to go left or right, which is neat.
(If you don't turn around it will try to get you back on route, but you might get in a tangle.
Track Navigator is more simple and if you miss a turn, you are much more likely to have to get the map out to check.
The choice is yours ...
There is a new version of Bike Tracker ( v1 1 30 ), released on 2nd January 2019, and that "Distance Remaining" / "miles left in route" bug is now fixed
In Google Play the best way I've found to find Bike Tracker is to search for Bike Tracker PC Ability
It also now offers miles & yards as an alternative to miles & feet.
Also, it now handles routes stored on the phone in folders, for example, routes in different UK counties or in different countries which means that my long list of routes to select from is now much neater