Known for offering discounted rates on last-minute hotel rooms, HotelTonight has launched a desktop version. Here’s what you need to know about using HotelTonight on mobile — where it started in 2010 — or on desktop to book reservations and compare prices: Shop around. For instance, the Atrium Inn, Vancouver cost $74 through HotelTonight earlier... Reyna Gobel is a writer at NerdWallet.