I don't have an iPhone or Android or anything like it but I understand the 'app' world for them completely.
I've seen people use them and I'm still underwhelmed since I rarely leave the house:
This comes after hearing of another polerizing topic, religion, attempt to connect with the younger generation by releasing a 'Confession app'. It doesn't replace actual confession so you still need to pay a padre a visit; all it offers is a walkthrough of the process and some navigation on what sin you may have commited.
It's available for $1.99 in the app store, someone comment if you have used it.