If you’re an average credit card customer, who has more than one credit card, and you enjoy getting rewards for paying with plastic, then you might like Reward Summit.

Reward Summit is a new app for iOS that enables you to get the most out of your credit cards’ reward programs. How? Simple: by letting you know which credit card to use for each purchase you make:

A $500 purchase at a home improvement store without Reward Summit could mean you miss $20 in rewards. Finally splurging on that big screen TV? Use the wrong card and you could lose $50 cash back. Small purchases add up too: grocery stores, gas stations, and other everyday expenses could turn in to a free vacation, a nice dinner, or extra cash at the end of the year.

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Understandably, you might be wondering about Reward Summit’s required level of access to your credit card information. Well, suffice it to say that you don’t have to enter sensitive information to use the app. You just have to specify which credit cards you’re using.

Reward Summit does require you to provide your email address and set a password, though, in order to gain access to additional features. It also recommends connecting to Foursquare or Facebook if you wish to be automatically notified of the best card to use when you check in at a store.

Reward Summit is available now in the App Store for free. The app is optimized for iPhone and iPod touch running iOS 6.1 or later.