Yeah, I use the free version too and honestly it works pretty well for me. The thing is, Call Filter actually works at the network level; the app is just a pretty front end for us to be able to block/allow numbers and manage settings. Call Filter can be used even on flip phones without the app, they just miss out on the blocked call notifications and have to change settings like block level and such on the My Verizon account from a computer. But because of that, there is no way for the network to "know" who is in your contacts. The app just knows they are in your contacts after the fact...