Are you tired of nonstop robocalls?  Well here’s some good news if you’re a Verizon customer – the company will soon block unwanted calls free of charge. Verizon already offers a robocall-blocking service for $2.99 a month, but plans to roll out a free app by the end of March. The app will check calls against a constantly updated list of known spam numbers.  Other providers like AT&T and Comcast are also working on ways to cut down on robocalls.