WhatsApp for iOS will let you hide your "online" status

Another sneak peek of what appears to be a future version of WhatsApp with extended privacy functionality. A future feature for WhatsApp on iOS will let users hide recent activity status and even online status from certain users or from all. The messaging app will allow you to hide your "Last seen status" from users outside your contact list, for example. A separate option named "Same as Last Seen" applies the same logic to your online status.

The developers' team is also working on an edit button for messages as well as reacts to messages in a chat. In fact, some of the features are already being rolled out to public beta testers. However, we don't know when these will be available to all users.