Platform: iOS; Free

If you're lucky enough to live by a beach, or are planning on taking a trip this summer, Waterkeeper's Swim Guide is essential when it comes to finding a good one that won't leave you regretting the trip. The app has descriptions of more than 1,300 beaches in Florida, California, New Jersey, and the Great Lakes. You'll want to avoid those dirty beaches as much as possible. Avoid a beach fail with this app