Whenever I need to book a hotel or flight, my first preference is cleartrip. It has the best UI among all the travel booking applications out there. It provides the best deals on flights and hotels all year round. Have already saved 15-20k in the form of vouchers through cleartrip rewards. They provide the best loyalty program for returning customers. Accepts payments through international debit cards as well unlike others. Their customer service is also good and prompt in accepting changes in booking and cancellations. The app also helps you keep track of all your trips. I would highly recommend this app for all your travel bookings.