How to hack whatsapp joke

Haha! This is the answer of your friend after see this app. You can spend a joke to a friend
simulating a hack of their Whatsapp! You can see the conversations and spy them, but it's just funny, not real!
The app simulates that the user enter his number phone and the people think that it's work, but no, it's just for entertainment.
If you like the app, please, vote with 5 stairs