Coppertone has a free app you can get from the iTunes store that will help you monitor how much sun your getting and remind you to reapply -- among other features.
Go
Once you download it you'll get access to a $1 printable coupon. Click print and it will give you the option to email it to yourself to print later.
App info:
COPPERTONE® MyUVAlert™ to the rescue! This handy iPhone application helps you with sun protection information for your whole family, offering local UV index forecasts, custom sunscreen reapplication reminders that you set, individualized product recommendations, coupons, sun protection tips and more.
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The COPPERTONE® MyUV Alert™ App offers:
• Custom reapplication reminders, which even allow for more frequent reminders when swimming or sweating. You can set reminders that work for you and your family, based on activity or personal preferences. Customize with choice of sounds.
• Sunscreen product profiles and recommendations tailored to each family member. You can even generate a recommendation list for the whole family at once, making shopping simple!
• Local UV index and weather forecasts, so preparing for your vacation (or staycation) becomes a breeze.
• Sun protection tips from the COPPERTONE® Solar Research Center.
• Valuable coupons for your favorite COPPERTONE® products.