Whatsapp sends message status, sometimes gray, sometimes blue, what's the difference?

Small checkmark: It represents our successful message.

Two small hooks: on behalf of the other party's mobile phone to successfully receive information.

Two small blue ticks: indicating that the other party has read the information.

After WhatsApp updates the "read" function, users can not only clearly distinguish whether the other party has read the message from the "blue" tick, but also further confirm the "sending time" and "reading time" by long pressing the message.

If the other party has "read", it can be found that a "blue tick" is displayed. In addition, press and hold the sent message and select "Information", even the "sending time" and "reading time" can be seen.

Extended data:

WhatsApp is a very popular cross-platform application for communication between smartphones. With the help of push notification service, this application can immediately receive messages sent by friends, relatives and colleagues. You can switch from sending SMS to using WhatsApp to send and receive information, pictures, audio files and video information for free.

WhatsApp is registered based on mobile phone number. When registering, you need to enter your mobile phone number and accept a verification message. Then WhatsApp will search your mobile phone contacts for people who are already in use, and automatically add them to your mobile phone contact list.

References:

Application and Development of Baidu Encyclopedia-WhatsApp