Truecaller app to identify unknown callers and block spam calls 2026

Truecaller — Caller ID and Spam Call Blocker for Android and iPhone 2026

Truecaller is one of the most widely used apps globally for Android and iPhone, with hundreds of millions of downloads. Its core function is revealing the name of any unknown caller — even if the number isn't saved in your contacts — as long as you have an internet connection.

How It Works

Truecaller operates on a massive crowdsourced database built from the contact lists of hundreds of millions of users worldwide. When someone installs the app, their contacts are uploaded to Truecaller's servers, creating the global caller ID database. This allows the app to identify unknown numbers instantly when they call.

Key Features

Beyond caller identification, Truecaller allows you to block spam and nuisance calls entirely — the phone won't even ring. You can also search any number manually by pasting it into the search bar to learn the owner's name before a call. The app supports call recording for both incoming and outgoing calls in high audio quality, and uniquely provides an AI-generated summary of each recorded call so you can quickly review the key points without listening to the entire recording.

Availability

Truecaller is free on Android (Google Play) and iOS (App Store), with a paid Premium version offering ad-free experience and additional features.