Default [Q] Any call block app for NON-rooted LG G2?

I am so on my last nerve with these robo dialers trying to sell me viagra and fix my credit.
I am about to change my number. The only reason I haven't is because of all the people I will have to notify if I do.

I am running 4.4.2 stock. Is there anything that will work well? I don't care if I have to pay.

I searched and only found a thread from 2012. Sorry if I didn't search thoroughly enough.