A free app for Android, by Cygnus Software.

This is the perfect application to have at your disposal. It is free and includes the data for all countries of the world. You can select any number of countries to compare. You will find a list of countries on the map, with the data for each of them. You will be able to see the name of each country and its location. 

If you want to explore the world, or if you just want to learn more about it, this app is perfect for you. It is easy to use and very intuitive.