This week's travel website ... Dream Cheaper. You send them your existing hotel reservation and they will continually shop around and if they find a cheaper rate, they will rebook you automatically and save you money. You'll sleep in the very same hotel room you initially booked but pay up to 60% less! And they'll keep doing it until 24 hours before you check in.
App - Mobile Passport. By the US Government. It enables you to expedite your entry into the US. It's for Americans and Canadians who have a B1 or B2 VISA. Good for Atlanta, Seattle, and Miami. Coming to Chicago soon. Meanwhile, Global entry is a much better option if you can get it.