If you want to know who’s that pestering fool that is bothering you with prank calls at odd hours, then the Truecaller app is a must-have app for you. This special app is going to help you identify basically anyone calling you from any mobile phone and located just about anywhere in the world. And it is not merely about knowing the prank call pest but also the liberty to blacklist certain numbers. Let us take a look at this worthy app. The Truecaller app is a free app that’s available to be downloaded from your respective app stores. It has a very simple and straightforward UI that is easy to use. After launch the app runs in the background and informs about all the calls you get. You can even access to advanced features. The first screen of the app lets you search for a number in your country. All you need to do is just type the number and you’ll be able to get the name of the account holder of the number and what network the person is using. The ‘Update’ tab lets you update all the numbers in your phonebook with missing information. Truecaller also caters to social networking, as you can sign in via Facebook, LinkedIn or Twitter and get the latest updates from friends when they call you. The app also has a ‘Call Filter’ tab that lets you add numbers you wish to block. You can add numbers to the ‘My Blacklist’ page and these numbers automatically get updated in the central database. Thus, the next time you get a call from a telemarketer, Truecaller will warn you that it’s most likely a spam call, which is really a great help. The app works very powerfully indeed. While it can’t always recognize landline numbers, it gets most mobile number right all the time. Conclusion Truecaller is definitely a must-have app for any smartphone user as it is free, very powerful and consumes very little battery.