Weather App for phones

Create an an app that grabs the local weather report, does a calculation using the heat, humidity, wind, precipitation, and uv index, and gives you a graphical depiction of what you need to protect yourself.

For instance, puting on sunscreen or wearing a hat. It can also tell you how often to reapply sunscreen.

It could have various skin types and sensitivites and the ability to customize your own (which would just be an offset amount from the original results so it is easy to program in).

Also, a timer function that creates an alarm when you should reapply sunscreen. This would be incredibly useful for someone with fair skin, sun sensitivities, is on medication that limits sun exposure, or others concerned with getting skin cancer.