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WhatsApp is a cross-platform instant messaging app that allows users to send text messages, voice messages, make voice and video calls, and share images, videos, and documents. The app is available for free on various platforms such as Android, iOS, Windows Phone, and desktop. WhatsApp was created in 2009 by Brian Acton and Jan Koum, two former employees of Yahoo. The app was initially launched as a simple messaging service, but over time it has evolved into a comprehensive communication tool with many features. Today, WhatsApp is one of the most widely used instant messaging apps in the world, with over 2 billion monthly active users. One of the reasons for WhatsApp’s success is its simplicity and ease of use. Users can start using the app right away by downloading it from the app store and verifying their phone number. The app uses end-to-end encryption to protect the privacy of users, which is why it is popular among users who want to communicate securely. Another key feature of Wha