通过购买此应用程序，您将捐赠 Callfilter.app 项目。
This app does not provide any functionality. By purchasing this app, you are donating the Callfilter.app project. In addition, this app gives you unlimited access to features available only to sponsors.
Important: please do not uninstall this app within a few days of purchase. If the app is removed from the phone immediately, Google will make a refund and the purchase will be canceled.