Hi,

Suppose I put an application on Google Play for recurring charges i.e per month billing.
Someone downloads my app, registered with it and I get the first month payment. But after some time user disconnect the services with my app.
How do I get to know that which user has disconnected from the services?
This is because he still has an application installed on his device and can use username and password to login into my app with he/she  registered.

Please help me in this.Also let me know if you want some more explanation about this.
waiting for reply...