A free app for Android, by Little Play Studio.

Delete All Contacts is a useful utility that can help you clean up your phonebook by deleting contacts or accounts from it. The program allows you to select which account to delete, so you can easily empty your phonebook by deleting contacts from different accounts such as Phone, SIM, Gmail, Whatsapp, and so on.

The app is simple to use and has a user-friendly interface. It is very easy to delete contacts from your phonebook. The best thing about this app is that it doesn’t require any special permissions to function. You can use this app without having to worry about any privacy issues.