One grey tick on a WhatsApp message simply means that the message has successfully sent from your phone, but it hasn't been delivered to the recipient yet. Most people know that two blue ticks mean a message has been read and received, but what about one grey tick? How 'tragic' disappearance of Gordo the monkey paved the way for NASA and SpaceX.Bizarre 'flying car' lets you take off and land vertically - right in front of the shops.People now have to deal with issues similar to 'the dirty R'.WhatsApp's ticks tell you everything you need to know about whether you've been blocked (Image: AFP via Getty Images) Read More Related Articles On one side, it's good because you always know when your messages are read, but that's also the bad side as well.

If you take a look on Twitter, there's a ton of people who have some pretty strong feelings about it. WhatsApp can now detect which of your sent messages have been read by the recipient.

They might have seen the notification on their screen, but did not launch the app (especially common if the recipient uses an iPhone).

They might be experiencing network connection issues.They could be sleeping, especially if they live in a different time zone.There may be several reasons why your message has been sent, but not delivered to your chat partner: If you only see a single check mark next to your message, there is likely nothing wrong with WhatsApp or your phone. Learn more about the Message Info screen on Android | iPhone | BlackBerry | Windows Phone | Nokia S40 | Nokia S60 | BlackBerry 10.

The Message Info screen shows you who has seen your message and when. The two blue check marks will appear when all participants in the group have read your message. In a group chat, the second check marks will appear when all participants in the group have received your message.

Whatsapp check marks stay grey