I keep my phone on silent at night, but I want to be able to receive calls from immediate family members in case of emergency. I want something that I can add contact names to and enable the app and never have to fool with it again except to add or remove people. I don't want something that will drain the battery much, and I don't really want something that keeps an icon in my notification bar. I hate clutter. lol But I can live with it if everything else fits.. Thanks, guys!