Threatened Amphibian Programme
Sasol Young Explorer Frog App
It has fun and interactive descriptions of 50+ species, including calls, videos and beautiful illustrations. There are also several games to play and one where you have to recycle rubbish to restore habitat and watch the frogs come back!
The app is available on the Apple app store here https://itunes.apple.com/app/apple-store/id1017287913?mt=8 and you can checkout the website for the app series here http://youngexplorerapp.com/.