It effectively blocks the numbers and keeps track of known robocall numbers and alerts to block them even before they reach you the first time! Try Call Blocker for free and save all the time and frustration you spend answering pointless marketing calls. To use the Call Blocker app you must subscribe weekly, monthly, or yearly. Subscription prices may vary by location and all subscriptions are automatically renewed. » Terms and Conditions: https://support.madduck.app/call-blocker/terms-and-conditions » Privacy Policy: https://support.madduck.app/call-blocker/privacy-policy » Help Center: https://support.madduck.app/call-blocker/help-center