La Roche-Posay My Skin Track UV
The La Roche-Posay My Skin Track UV ($60), along with its coordinating iOS and Android compatible app, can tell you exactly how exposed you are to pollution, pollen, heat, humidity, and UV at any given time – lending anyone who's trying to take the best care of their skin an extra layer of protection. The small device is sleek enough to go relatively unnoticed when clipped onto clothing or worn as a necklace.
How does it work? The Skin Track UV contains a small LED light that detects UV exposure. The results are then sent to your phone, where the app analyzes data and makes skincare recommendations based off of that information. When you've reached your maximum daily allowance of UV exposure (which always seems to come sooner than you'd think), the app will alert you and recommend a sunscreen. Brilliant.