Our favorite component is that you can modify the list as you see fit and use that same master list over and over again. It eliminates the need to create a to-pack list from scratch for each trip; we inevitably forget to add an item or two our lists from the outset.
Aside from crossing off your to-be-packed list items, the app reminds you of things to do before your trip, like getting travel insurance, exchanging currency, watering the plants and emptying the fridge.
But the best thing about the app from Grace Hotels—whose properties include the new Vanderbilt Grace in Newport Rhode Island Grace, Grace Mykonos and Grace Santorini—is that it's free on iTunes and compatible with an iPhone, iPod touch and iPad. And now, we're off!