An application use permissions to access telephony, also use optional permissions to access contacts, memory (SD-card) and “Do Not Disturb” mode.
Uses for blocking incoming calls.Incoming caller ID, date and time of incoming call can be sent to the server for analysis. Other data, such as an incoming caller’s name never sent to server.The phone number and other information that can be used to identify the client never sent to server.
Uses only for the visual design and the ability for using contacts as blocking exceptions.Contacts never sent to server and aren’t processed. All contacts information is only uses on your device.
Memory (SD-card read/write access)
Uses for import/export black & white lists.
“Do Not Disturb” mode
Uses on devices with Android 6 and higher for disable sound and vibration while checking incoming number.