True caller is calling app and it is very usefull app. The true caller show the name of the incoming caller name. It works good an perfectly the concepts is very good. About 15 mb app and avaliable on playstore. The app show the name of the number just dial the number and it automactically show the name of the honour of the number. It is running by internet both wifi and data connection it also gave the advice to dont pick the spam calls. It gives the feature of call blocking you can add any number to the bloklist. It also show the email id of the person. Just enter the number in dial pad it shows the name of the honour and their email id. It is very usefull and working app. Please install to free from spam calls