Anyone who has ever experienced the special kind of horror of having your mom, spouse, or coworker (God, it could be anyone) swipe through your photos and stumble upon a photo they definitely should not see will 100% agree with this statement: the next iPhone needs to have a guest-mode feature.
Even if this hasn't happened to you, God willing, we're all packing classified information of some variety on our phones. There's a certain anxiety that engulfs you whenever you hand your phone off to someone else, whether it's to give them a closer look at a photo or show them a hilarious text exchange. Are they the type of snoop who will take the liberty of scrolling past said photo? Will they accidentally get a peek at the steamy sexts you've been exchanging with your boss?