For small children who are just starting to recognize animals.
Cornelius Proctor is the local animal doctor who treats various animals when they come to his clinic. The children have the opportunity to guess what the animal is before it is revealed.
This is really an electronic book (with Audio) as much as an App.
The free version has just 2 animals. Try it and if you like it, a full version is available for a few dollars on Google Play.