Italian student Gianni De Gennaro has developed the app "VoyageX" that allows you to create a map of the countries (and even regions) you have visited, record how many World Heritage Sites you have been to, read the descriptions/info and much more.
The app is available for iPhone, iPad and iPod Touch. The app is free to download, but you have to buy the "Pro version" to gain access to regional maps and the World Heritage List. The app is available in English, Italian and Spanish.
You can check the app out at this link: https://itunes.apple.com/it/app/voyagex-been-travel/id1096626087?mt=8