Calls Blocker is a program that blocks unwanted calls, such as call centers,spam, telemarketing, private calls, hidden calls, anonymous calls, strangers, etc.It's a very simple and light call blocking program, but it's totally free.* Block all numbers using the Blacklist* Block numbers not present in the address book* Block private / hidden numbers.* You can enable the option to disable all incoming calls except the Whitelist* With the option "Start with", "End with", "Contains"; a large number of unwanted numbers can be blocked.* In addition, it is possible to use the Whitelist not to block, in any case, the most important numbers.* Possibility, with the scheduler, to choose when to activate it automatically, choosing the start and end times and the days of the week.