In reply to yorkshire_lad2:
I use Visorando for Fontainebleau; not used it further afield.
In the free version one can download the route for use offline, and combined with phone's GPS and the written route description, it's almost impossible to get lost.
As for route selection, the search function is easy to use.
One can also upload a route: I've not tried yet myself.
Happy hiking !!