The TrueCaller app permits the user to search for all listed phone numbers published in 25 countries including United States, Italy, India and Canada. It also helps indentifying callers and blocking unwanted calls. TrueCaller app also offers a simple blocking method that permits only specific calls that are important to the user to get through. It gets more features that will make your phone smarter. However, to make your phonebook public or searchable, TrueCaller apps NEVER uploads it. Also, due to technical restrictions, iPhone does not support Live Caller ID.