"Apple does not allow other apps to replace the default SMS/messaging app." https://support.signal.org/hc/en-us/articles/360007321171-Can-I-send-SMS-MMS-with-Si

"Apple does not allow other apps to replace the default SMS/messaging app." https://support.signal.org/hc/en-us/articles/360007321171-Can-I-send-SMS-MMS-with-Signal-#ios_sms https://support.signal.org/hc/en-us/articles/360007321171-Ca... Oops, I must've been remembering Android. Well, it's one way Apple could fix this unconscionably lasting security hole.