Hi, I'm new here and have been wondering whether there is an app out on the market that blocks phone calls at certain periods of time throughout the day! Such as at night time, I get obnoxious calls that wake me up! Or while I'm in class... Is there such an app that blocks phone calls from like 12AM to 7AM. I've been googling like crazy and I can only find apps that block certain phone numbers. Please help! Thank you very much...