Meet QTemp: a smart wearable device that measures UV and temperature and displays useful tips on your iOS or Android device based on the data. QTemp recommends sun protection and alerts you when to reapply sunscreen. The device is weather and dust resistant. It is small enough to fit in your pocket.
QTemp is compatible with iOS, Android, and Windows devices (NFC devices). If your phone does not support NFC, you can get QTemp-i , which relies on Bluetooth to connect to your phone. The product is getting funded on Kickstarter.