If you purchased through Google Play, we offer an unconditional refund guarantee beyond the initial refund window, to the extent that Google will permit it. Simply send the Google transaction ID to firstname.lastname@example.org.
If you purchased through Amazon, you will need to contact them directly and request a refund. There is no way for developers to issue refunds.
If we issue a refund, Google will most likely uninstall the app from your device without your interaction. This is completely out of our control.