I don't like your app, give me a refund!

Within the first 48 hours after purchase, the easiest way to get a refund is to go here

https://support.google.com/googleplay/answer/2479637?hl=en

and select "Request a refund".

If you want to get a refund later, please send me the "Transaction ID" starting with "GPA..." which you can find either in the receipt Google sent you by email when you bought the app or at https://pay.google.com. Alternatively, send me the email address of the account under which you purchased the app.

Note that after Google processes the refund, the license check within the app will prevent it from starting normally and it will not be usable any more.