WhatsApp is one of the most popular messaging apps in the world. Whatever your opinion of the app's privacy policy, there is no doubt that WhatsApp is incredibly easy to use for messaging, group chats, voice and video calls, and more. There have always been one or two quirks of the app that have made it more awkward to use than it needed to be, however.
How to WhatsApp without saving a number
You no longer need to add numbers to your contacts before you can send a WhatsApp message.