I want to know if a user is online at a given time or not. So that commenting on a question or answer would be effective.

Because the user profile only shows that the user was last seen : (Ex:30 minutes ago) but he/she may be online now.

  • Keep in mind that the Q&A format is not meant for rapid discussions.
    – guntbert
    Commented Apr 22, 2014 at 14:53

1 Answer 1


Can you know? No.

But leave them a comment (using their @name if applicable) and they'll get a notification when they are online.

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