The Clés de Forêt is available on the iPhone and Android based systems, and it enables you to discover more than 30 of the principle trees found in the forests of France.
An update has also provided information on spotting some of the birds and animals you might spot when in the woods, or at least some of the tell-tale signs of them having passed by.
You are helped in your search by going through a check-list of observations, such as the shape and position on the branches of the leaves, and then details of the tree the app believes you are stood in front of.
There is also a simple search option allowing you to find out more about the different trees and you can browse a photo album, as well as add your own.
The Clés de Forêt application is free, and does not require a data connection when out in the woods.