Truecaller is a smartphone application that has features of caller ID, call-blocking, flash-messaging, call-recording (on Android up to version 8), chat and voice by using the Internet. It requires users to provide a standard cellular mobile number for registering with the service. The app is available for Android and iOS. History. Truecaller is developed by True Software Scandinavia AB, a privately held company with a head office in Stockholm, Sweden, founded by Alan Mamedi and Nami Zarringhalam in 2009, but most of its employees are in India.
https://en.wikipedia.org/wiki/Truecaller