Photo: Courtesy of Harvest

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Missed the Saturday farmers' market? This app can help you pick the ripest and freshest produce at the grocery store with smart buying advice for more than 100 fruits and veggies. For instance, the more vivid a strawberry's color, the more likely it is to be high in antioxidants.

Bonus feature: With pesticide data from the Environmental Working Group, you'll know which produce has the least residue.