We all have that friend or relative who can't help but swipe through dozens of photos when we hand them our phone to check one pic. It's an involuntary reflex, a primal need to just see what's after and before that photo, because what if they were better than the one they're looking at? And why do those photos have to stay hidden and undiscovered, they should be seen by more eyes — that's their destiny as photos.

Android's screen pinning feature isn't that useful in that instance because nosy voyeurs still have access to your entire gallery. Focus is an alternative app that lets you lock viewing to a single photo, but that's a paid upgrade and there's no real fun in using it.

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