Put off planning your summer vacation? You're not alone. ABC News reports that 41% of families say they haven't yet made any summer travel plans. The hold-up? The economy, of course! Here's what they have to say: "To stay within budget, many families are watching for last-minute deals and keeping an eye on gas prices before finalizing plans.".

Another barrier is how tedious planning a vacation can be. Research takes time and effort that so many of us don't have. Enter the smart phone, and the app. Now we can book vacations while we sit in traffic, while we stand around waiting for our prescriptions, while we read the Internet on our computers and also on our phones. Here have 5 apps to help you book a last-minute vacation as quickly—and cheaply—as possible.

1. Hotel Tonight

Hotel Tonight saves its users up to 70% on hotels in the U.S. and Canada. The catch: Deals only become available the day of the booking, so this app truly is for the last-minute traveler. The app is super user-friendly, and offers up to three deals each night, which is brilliant: Choices are much easier when the options are few. This app is available for both iPhone and Android.

Find the best value hotels at your destination