I’ve had Call Filter crash several times in the past years. The only thing is it doesn’t stop spam calls from getting through. According to Verizon the nuisance calls, spam calls, scam calls, robo calls are using a computer to install the bogus phone numbers automatically which in turn has to use Verizon’s cell service network to get to our phones. Verizon has to stop the calls on their own. We shouldn’t have to buy or use an app to stop the nuisance calls.