Ever thought you put sunscreen on properly only to get a Harry Potter lightning bolt sunburn? You know what I mean. You have your friend apply sunblock all over your back and they miss three big spots leaving you looking like a red and white leopard.
The Sunscreenr ($93) aims to help with this problem. It is basically a tiny waterproof UV camera that can show you exactly where you have applied, and missed, with your sunblock. Great idea, and yes I want one.