Spending too much time in sunlight is not great for your body. You could get sunburn or end up developing other serious health conditions. The YOUVI is a handy accessory for your Android / iPhone device that shows you the UV index for your location as well as the ambient temperature. Just plug it into the headphone jack of your smartphone, and you are ready to go. No external power source is needed.
YOUVI’s companion app lets you track multiple users with different skin types. It alerts you when you have reached the max exposure time within safety limits. You can share your data with others in the community. The device is not too much bigger than a AAA battery, so it is very portable. It can even be plugged in with an extension cable. You can support this project on Indiegogo.