Hopper is a travel booking app that helps users find the best deals on flights, hotels, and car rentals. The app uses machine learning to predict the best time to book, and users can freeze prices for a small fee. The app also offers a 24/7 customer support service and daily deals and discounts for its users. Hopper has over 60 million downloads and has become one of the fastest-growing travel apps in recent years. The app is free to use, but users can pay for additional perks such as price freezing and travel refund options. In addition to flights and hotels, Hopper also offers car rentals and short-term rentals through its Hopper Homes feature. Users can search for travel options by selecting category options and inputting their information. The app is considered one of the best travel apps for its ability to help users save up to 40% on travel costs. Overall, Hopper is an easy-to-use app that provides a convenient and cost-effective way to plan and book travel.