Best app for spam blocking

I am getting an unbelievable number of spam calls. I am looking for an effective spam blocker. I know that downloading the wrong app can make the situation worse. I did something that has made me a spam target. My wife, on the same account, does not have the problem. I would like to hear from others who have experienced good and bad results from spam blockers.

I thought I had already posted this but can't find it. If this is a double post, please forgive.