According to Samsung-dedicated website SamMobile, we are about to see an ultraviolet sensor, placed on the front of the new Galaxy Note 4. Reportedly, it is going to be able to measure the amount of UV radiation we are being exposed to and inform us when we are in danger of damaging our skin. Whether this will be done by notifications or by interacting with the app remains to be seen.
To be honest, we can't remember the last time we went to the beach and thought to ourselves "Man, it's hot out here. Wish we had UV sensors in hand to check if it's safe to get some tan". What's your take on this?