The number behind is not the real phone number from the boss, but a forwarding number. If you send a message to the number, the message gets in a queue for the boss to read and he will see the message when he is back in office.
Actually: While these kinds of services exist, they would result in a green message box in iMessage. So here it’s clearly just a joke between pals
Technically: Thats no app but normal messaging
The number behind is not the real phone number from the boss, but a forwarding number. If you send a message to the number, the message gets in a queue for the boss to read and he will see the message when he is back in office.
Actually: While these kinds of services exist, they would result in a green message box in iMessage. So here it’s clearly just a joke between pals