We need to create a short advertisement message that will pop up when a user opens a mobile application on iPhone, Android, Windows Phone and BlackBerry.
Our budget is 30-50$.
Here's the specification:
xml file is stored here: [url removed, login to view]
Every time a user opens the app the program should check if the pop-up was shown already.
If yes, it should compare the show date with the date of the latest content. If the latest content was created later the dialog should be as follows:
open the link?
renew the date of the latest shown message