I have purchaised today the ios version.
Launching the app the first screen says: Welcome to pocket earth! To get started we need to download about 7 MB of required data. After, you will be given the option to download detailed worldwide travel guides and Wikipedia articles.
After few seconds i get the message:
Failed to download some of the required data. Please check that you are online and try again.
Of course I am online and all other apps communicate without any problem.