What made WhatsApp so popular initially was its double tick feature that informed the sender that the message has reached the recipient’s phone (although he might or might not have read it). Now, WhatsApp has quietly added another nifty feature to its app that can even tell whether the recipient has read your message or not.
The trick is pretty simple. As soon as the recipient reads your message, the double grey check marks next to the message turn blue. It even works in group chats, where the single check mark turns blue when everybody in the group has read the message. Long pressing a message reveals the Message info which details when the message was delivered and when it was read.
The new feature doesn’t require an update and is already available on all platforms. Although, it wouldn’t be wrong to assume that it won’t go well with all users who still wish to keep a little privacy.