iOS

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  Universal (iPhone + iPad)

  Hipmunk

  get itFree

  You're on the road, it's getting late, and you need to find a hotel, right here, right now. You could search a half-dozen travel sites, or you could let Hipmunk do it for you, and get you a list of available rooms, along with reviews and rates, immediately. Hipmunk also lets you book rooms and flights in advance, if you're the type who actually makes plans.
• 
  Universal (iPhone + iPad)

  TripIt

  get itFree

  Whether you think putting together travel plans is fun or a chore, TripIt can make it easier by helping you keep your flights, hotel reservations, and other info in one place. It can automatically import confirmation notices from your email, help you find hotel deals, and, of course, keep track of all of your frequent flyer points.
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  iPhone

  SeatGuru

  get itFree

  Find out which airplane seats have more legroom, which are closest to exits, and which have problems like limited reclining space. Then book your flight straight from the app, and lock in the seat that will make that flight more bearable.
• 
  Universal (iPhone + iPad)

  Yelp

  get itFree

  Get user reviews of local restaurants, stores, and other businesses no matter where you are. You can add your own reviews, get directions, and even use a heads-up mode called Monacle that highlights local businesses as you walk by.
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  iPhone

  Just Landed

  buy $1.99

  Never show up at the airport too late — or too early — when you're on pickup duty. Just Landed will send you reminders when it's time to leave, warn you about delays, and let you know which terminal to go to.
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  iPhone

  Uber

  get itFree

  Sometimes you just need a ride, and with Uber, you can have a car waiting for you in most major US and Canadian cities, whenever you need it. Rates are comparable to other car services, and you don't have to stand in the rain swinging your arm and praying a cab will cruise by.