If so far, we have seen gadgets that only help us externally, letting us have amazing experiences visually, this little device breaks through 2018 to help us with our own health. L’Oreal UV Sense is a battery-free wearable device that will measure the UV exposure at all times. It is very small, having only 2mm of thickness and 9mm in diameter. Don’t be fooled by its size, this little gadget can be worn on your fingernail and it connects with an app that will let you know the level of sun exposure. I mean, how thoughtful is this?