*app, not “up”
When I send people texts, they might be Apple users or any other various phones and texting apps, are any of their texting apps such that it notifies them when a message has been seen or read?
I don’t get “seen” or “read” information on my end. Do they?
They don’t. iMessage doesn’t have read receipts built in for SMS (green bubbles), only blue bubbles sent from an Apple device.