There is an app that calculates your sunburn risk. You fill in your region, enter your skin type, and say whether you are wearing sunscreen or not. The app then calculates the UV index for your location and tells you how quickly your skill will burn. There is even a timer for tanning! This is great for those summer trips to the beach. "When you tap the Start button as you go outside, it starts a timer in a colorful alert bar to tell you how much time you have left to spend in the sun and when more sunscreen is needed. When it is time to seek shade or reapply lotion, it will alert you visually and with sounds."

Possible Preaching Angle:

What about the alert to spend more time with the Son (you knew that lame pun was coming)? How has your exposure to the Son been lately?