Truecaller finds contact details globally given name or telephone number, and has an integrated caller ID
service to achieve call-blocking functionality and social media
integration to keep the phonebook up-to-date with pictures and birthdays. Truecaller name is derrived from the feature of the app that it can show the True identity of the caller.
This app is available for Android, iOS, Blackberry OS, series 40, Symbian s60 and Windows Phone. You can also use its web version by visiting truecaller.com
Following are the features of truecaller.