Parents need to know that WhatsApp Messenger lets users start video calls and send encrypted text messages, videos, photos, and audio messages to one or many people with no message limits or fees. Messages can only be sent to other smartphone users who also have WhatsApp.
The app checks your phone’s address book for WhatsApp users and connects you automatically. It also encourages you to urge friends not using the app to sign up. The app store rates the app 4+, but its license agreement requires users to be 13 or older, and location-sharing makes it most appropriate for older teens.