Showcaller

Showcaller is an app that lets you find out instantly who's calling you on the phone, even if you don't have the number saved in your contacts. And most importantly, it lets you find out if that number has been marked as spam by other users of this app.

When you first start the app, Showcaller tells you which numbers that have called you before are spam. Then it lets you block calls from those numbers with just a tap. In other words, all the spam, scam calls, sales calls, etc., won't even make your phone ring.

That said, blocking undesired calls is just one of the features offered in Showcaller. It also lets you easily add contacts to your address book and, even more importantly, quickly find any contact in your diary. Plus thanks to the smart dialing features the app will suggest numbers as you dial. And it's normally accurate in its predictions.

Showcaller is a very useful app that you can feel totally safe about replacing your default dialer app with. Not only does it make a bunch of interesting features available, but also boasts a convenient and easy-to-use interface.