After going through several data matching/refining algorithms, this data is made available to all Truecaller users. This data is then uploaded by the App to the company’s servers. As part of the user agreement, the Truecaller app asks you to allow it access to your address book/contacts on your smart phone. In order to use the App, you have to download it and allow it access to your entire list of contacts in your phonebook. The app is available in all countries because Truecaller uses crowdsourced data (data collected from public users) which allows it to work in places where public data is unavailable such as the UK, India and SA. Most smartphone users use the Application (“ App”) to trace and block spam calls, but have you ever wondered how the App has access to all these names and numbers in the first place. It lets you search for contact information, identify incoming calls, and block calls you don’t want to receive. Truecaller is a global telephone directory and reverse directory that has caller ID, social media integration and call-blocking functionality.

Truecaller id