Rewards credit cards a fantastic tools, especially if you can maintain a $0 balance on your cards each month. And there are some cool free apps that can help you manage and maximize these rewards if you have a smartphone.

Reward Summit:

Use this app (available on iPhone and Android) to tell you the best credit card to use for any given purchase. You don’t even have to give the app your credit card information; just identify the cards you use.

The app even converts points into a dollar value so you can quantify the rewards you’re getting from a specific credit card. It also shows you how much you could’ve earned if you had used a different credit card. And if you link your accounts through Intuit, the app will also recommend new credit cards based on your actual usage patterns over time.

Smorecard:

You don’t have to give your personal information to this app either. Just select the cards that you currently have in your wallet and the site (using their GPS system) will help you determine what card to use based on where you’re shopping. You can also choose to customize your credit profile if you’d like the app to consider intro offers and special rewards opportunities.

Learn about 1 other helpful app over at Wise Bread’s 3 Smartphone Apps That Manage and Maximize You Credit Card Rewards.