Yesterday, the popular messaging service WhatsApp had two updates: one was server side and the other was an actual app update. Although bugs and fixes were listed in the changelog, as it turns out much was included than previously thought.
WhatsApp now included detailed 'seen' and 'read' information for messages you sent to either individuals or groups. In fact, for groups it will show who read the message and at what time, alongside who has not yet read your message (but the time it was delivered to them).
Full story from the WindowsCentral blog...
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