You can have an independent pin and email in WhatsAp.I just checked WhatsApp and Signal. Both have screen locks, BUT both are tied to the iOS passcode and optionally Face/Touch Id.
So this won’t work.
But, IMHO, seems like your “friend” should get his own device.
Nope, not the only one. If I have to hide something from my wife, then whatever it is I’m hiding is most likely morally wrong and I shouldn’t be doing it. We share a LastPass account and all our passwords and PINs are in there. I can go into her phone at anytime and she can mine, but I don’t ever feel the need to. But hey, everyone’s circumstances are different.This doesn’t sound fishy at all... wow.
am I the only one that while driving, get a text, and just have my wife read it to me? I even have her reply for me at times.
and yes, my friends send me photos of women.