I got Truecaller, this app, and its only works part of the time. Understanding there are constantly new numbers added to the spam list, I expect to update Truecaller database daily. Not that big of a deal. The problem is, it clearly identifies a spam caller, but still allows some through. I have found it blocks legitimate spam calls as I recently put my resume online and immediately began getting spam calls. I bought the new iPhone X 256GB, but neglected to turn the blocking options on in settings. Once that was done, no more spam calls... or so I thought. The calls I was receiving, promising job opportunities, required me to sign up for more school. Holding two bachelors and a masters degrees, I politely told the first few I had no interest in school and explained my education level. If you refuse their persistence in signing up for school, they rudely say they can’t help. this app stopped these. However, while clearly marked in red a call is spam and you answer, you will find they let collection agency calls through. I’ve had my number for 10 years now and still get collection calls for someone I don’t know! I haven’t found any better app out there, though, so the collection calls will have to manually be rejected.