12. Booking

This app is perfect for the frequent traveler.

It gathers info from all the major hotel-booking sites like Priceline and Expedia to bring you the best deals on hotels, B&Bs and more. Researchers with Time magazine tested the app and found up to 50 percent off the list price on same-day reservations.

You can also narrow your search by preferences such as WiFi access and review scores. An offline map helps you get to your destination without Internet access.

Booking also extends to cruises, car rentals and other travel services to find you bargains.

Booking

13. Hotel Tonight

This app can come in handy when you have an unexpected layover or whenever you feel like taking a spontaneous trip—or anytime you need a hotel room ASAP.

Hotel Tonight helps you land bargain deals on hotels around the world at the last minute. You can arrange same-day bookings until 2 a.m. Hotel Tonight also offers 24/7 customer service.

Hotel Tonight