Sun Keeper

This simple and user-friendly app helps you to manage your personal recommended daily sun exposure for optimal production of vitamin D and overall skin health — and before you’re ever at risk of burning.

By authorizing your location and entering basic personal information about your skin type, Sun Keeper will calculate a sufficient and appropriate length of time you should spend in the sun. When your sun-exposure limit is reached, the app will alert and remind you to reapply sunscreen, cover up, or get out of the sun.

Sun Keeper offers recommendations that vary with the individual and are based on the personal information you enter along with your location, date, and time.