iBlacklist Manager - Block Unwanted Calls

iBlacklist helps you block unwanted phone calls and manage the allowed and disallowed contacts in a easy way.

It supports multiple contact sources:
1.You can see how many contact sources of type e.g. Local, iCloud, Exchange, CardDAV server and Exchange GAL, you are currently having and how many contacts in each source
2.Allows you to switch among different sources, for example, you can configure and build your personal allowed group of your "Facebook" or "Yahoo" contact source.

This app has a simple and efficient trio-view (All / Allowed / Disallowed) where you can list or delist contacts from the group very easily.

Allowing or disallowing a contact is as easy as:
1.Open the app
2.Tap the contact (when you tap a contact it will toggle between Allowed/disallowed status)
3.Close the app!

It works seamlessly with iOS6's Do Not Disturb feature - When iOS6's Do Not Disturb is ON, while your device screen is locked, calls, alerts and notifications will be silenced. Calls are sent to voicemail automatically if they are not coming from the Allowed contact group. Please read the build-in guide on how to use it.