Answer 1

Why do you need the source code?
Either you want to make a clone of it or you just want profile info

Answer 2

Okay then bud, have fun with that

Answer 3

Cause lots of apps are not open source. You have no right to see them. If you have a home am I allowed to walk in and take everything from it to build a similar home?

Answer 4

What do you mean why? You are not entitled to someone else's hard work. The question you should ask yourself is why you think you deserve to be.

Answer 5

By reverse engineering the app, it's not an easy to do though.