So I made an app for this person and he did give me 50% of the money. But the thing is he just gave me 50% of the money and put the app on the play store. Now whenever I try to contact him he says he is busy or in hospital or something. I stopped all his ad services but still isn't replying. Is there any way I can remove his app from the play store.
@user3772366, was the 50% that he paid you an initial milestone payment? If you've tried talking to him already and it doesn't work, perhaps it's time to shoot an email to the Google Developers Support team and tell them your situation and tell you them you have the original source code to prove that the app was developed by you.
This has happened to another developer that I know of and it was resolved when Google took the app offline while they wait for the guy that posted the app online to respond to the conflict.
I think it's definitely worth a shot. I seriously hope you have the payment arrangement in paper trial (emails, letters, etc) so that you can prove that he has not fulfill his side of the bargain.
FYI, perhaps watch this before you start any new job ;) F@%# You, Pay Me
No you cannot. Did you give him the sources? I hope not.
You can give his app negative comment and you can rate the client badly via the website you used to work thru.
You said you have access to his add service? That is good cause you control his money inflow.
But other that what you already did, there is not anything you can do.