WhatsApp users will now have the option to turn on disappearing messages by default for all new chats. When enabled, all new one-on-one chats you or another person start will be set to disappear at your chosen duration, and we've added a new option when creating a group chat that lets you turn it on for groups you create. This new feature is optional and does not change or delete any of your existing chats.
We are also adding two new durations for disappearing messages: 24 hours and 90 days, as well as the existing option of 7 days.
If you switch on default disappearing messages, a message will be displayed in your chats informing people of the default you've chosen.
You can download WhatsApp Messenger from the App Store for free.