Other apps show exactly how far away you are. That is close enough for someone to follow. Here you show up as an area - and if you would be the only one in it, we make it bigger until you are not.
Share your area, or share nothing and browse. Hand out keys to your private album one at a time - take one back and the photos go with it.
Lock it behind a PIN, and give the icon on your phone whatever name you like. None of this shows up in a web search - and if you want, a friend can be told you got home safe.
Take a full copy whenever you like. Delete it for good in one step. If we ever check your age we keep the answer, never the document.
Vanish from each other everywhere at once. No warning to them, and no gap where they can work it out.