It is a awesome apps.it is installed in all my android phone abd tab.best feature in this apps is if any call is coming from an unknown number and your net is on in the device you can easily recognise who is calling you.and it shown the name or the company that is smap in red mark so at that time you can avoid that call if you wish so.other features like you can also check which operater the person calling you is using and from where he or she is calling you.so I will suggest each and everyone to install this apps.