Call Blocker helps you avoid annoying calls. Just add the number to the "Blacklist" or use the simple blocking options. You can add any unwanted numbers to the "Blacklist" from calls log, contacts list or input the number manually. Also, using "Begins with" option, you can block a range of numbers with certain first digits.
Using options from the "Blocking" tab, you can block calls from private, unknown or all numbers. If you don't want to block calls from a certain number it is enough to add it to the "Whitelist". Numbers from this list will be never blocked by the app.
Blocked calls are always available in the "Log" tab.