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If you never know what to expect from your hair in the morning, you're going to love the new (free!) app "Curls on the Go."  The creators of NaturallyCurly.com worked with a chemist to create an equation based on temperature, precipitation, humidity and dew point that provides you with a daily, 3-day, or weekend frizz forecast, tailored to your kind of curls and where you live.

You can also browse a list of products recommended to keep things under control. They're road-tested and reviewed by women with a curl pattern similar to yours (the app breaks curls down into 9 types--from wavy swavy to kinky ziggly). Plus, there's advice from experts, a salon-finder to help you locate stylists in your area who specialize in cutting and styling curls, and how-to videos so you can treat your hair like a pro. With this tech-y tool in hand, you'll never have to guess about what Mother Nature has in store for your curls--making bad hair days a thing of the past.

Keep reading for more curly hair advice:

Curls gone flat? Val explains why and what to do about it
The best products for your hair type