Call Bliss silences unwanted callers, while ensuring you never miss important calls, making Do Not Disturb easier to use and more powerful. Allow or silence callers and groups of callers with a single tap, or automatically by location, Home, Work, or anywhere else.

At the office? Allow co-workers and your boss to ring your phone. At home? Ignored! Create groups of callers such as Friends, Family, Co-Workers, Bowling Team, and allow or silence all of them with one tap.

Includes special modes. Put unwanted callers in the "ExcludeList", while ensuring other contacts can always reach you. Need to focus on a project? "Suppress All Callers" mode sends all calls to voicemail until your project is done.

TUAW: "Call Bliss 1.1 improves on the original"
http://www.tuaw.com/2013/04/02/call-bliss-1-1-improves-on-the-original/

CultofMac: "Heavy-Duty Do Not Disturb iPhone App ‘Call Bliss’ Adds Blacklist, Maps"
http://www.cultofmac.com/220371/heavy-duty-do-not-disturb-iphone-app-call-bliss-adds-blacklist-maps/

CBS News: "works great"
http://www.cbsnews.com/news/iphone-tool-automatically-screens-calls/

PC World: "Call Bliss turbocharges iOS"
http://www.pcworld.com/article/2019577/app-spotlight-call-bliss-turbocharges-ios-do-not-disturb-feature.html

LifeHacker: "it works well and adds a lot of features to Do Not Disturb"
http://lifehacker.com/5971209/call-bliss-blocks-unwanted-calls-based-on-location-no-jailbreak-required

Note: Call Bliss requires an iPhone with iOS 6 or later. Do Not Disturb does NOT BLOCK unwanted calls, it silences unwanted and unknown callers, unwanted callers can still leave voicemails. Continued use of GPS running in the background can dramatically decrease battery life