'CallWeaver' (CW) is a call blocking application. It does only this function but it does it very well. CallWeaver has a simple logic based in filters. There are three predefined filters and the user can add more personalized ones. If an incoming number DO match a user filter, what in the filter is specified will be done. If an incoming number DOESN'T match a user filter, then if the number match any standard unchecked filter the call will be rejected." CallWeaver does not have any background service, so it doesn't take any device resources, memory or CPU while no call / SMS / MMS is coming. You will block your job calls on weekends or maintain the phone open during nights only for your family urgent calls!!!