Smart Call Blocker

Delete account

Deletion is done in the app, under Settings. This page shows the path, what is erased and what you cancel separately.

Open Smart Call Blocker and tap Settings.
In the Privacy section, tap the red Delete account button.
If you are not signed in, the app asks you to sign in with Google in Profile. Without sign-in there is no remote account to delete; to clear only this device, use Erase all local data.
When signed in, confirm in the dialog Delete permanently. The app asks for Google again; if you cancel, the account stays.
When it finishes, the message is Account deleted.

Your Google Play subscription is not cancelled here.

Cancel it in Play Store → Payments & subscriptions. Deletion removes your profile, cloud backups, stored objects and the device link. Local data on this device is also erased.

The “Delete account?” dialog in Smart Call Blocker, warning that the Play subscription must be cancelled separately — Settings → Privacy → Delete account