General Secret folder/Secret app

I have an idea I would love to see, based on the tweaks recently coming out it seems like it would be easy.

I'd like a way to have either a folder, or even just an app, only open with your fingerprint. Not just locked, but completely hidden with no icon until you use your fingerprint.

 

Actually, I just think it would be cool to have my own folder that only opens for me. I don't really need it for anything.