Priceline is a hotel and flight comparison app that allows you to ‘bid’ for a hotel by naming your own price or choose a mystery hotel by amenities, location and stars. Whether the price for either of these is cheaper than normal or other comparison sites is hard to say, as you don't get to review the hotel before purchase, but they have potential. Flight comparison in Priceline is more basic than other sites such as Skyscanner, but paying by Google Wallet is nice as it speeds up checkout.