In a post on the latter, he envisaged an app that would remove the pressure to be constantly available and to reply immediately by delivering messages only once a day.

Strong's office did not reply immediately to a request for comment.

You will later receive a letter demanding further payment and should reply immediately, again refusing to pay and explaining why you could not buy a ticket.

Reading replied immediately but were again out of luck.

You wouldn't hassle your friends for not replying immediately.