Android - Simple reading contacts app.

App workflow -> First screen, 1 button lets call it SCAN, once clicked you get a splash screen with a progress bar that takes 5 seconds to load. After load show 1-5 random contacts from the users phone contact list, which are going to be stored. Next time he opens the app he will see the same contacts showed before. If he clicks SCAN again within the next 10 days, he will always get same results, if he does it after 10 days, 1 of the previous results will remain and 1, the others deleted and replaced with one random phone contact.