BETHESDA, Md., Sept. 3, 2013 /PRNewswire/ -- Marriott Hotels, the flagship brand of Marriott International (NYSE: MAR), continues to make travel more brilliant by offering mobile check-in on its wildly popular Marriott Mobile app at 329 properties in the continental U.S. and Canada*. This represents the broadest mobile service of its kind in the North American hospitality industry. (Logo: http://photos.prnewswire.com/prnh/20130903/PH72905LOGO) Today's always-connected Marriott Rewards members, who have downloaded the Marriott Mobile app, can check-in using their smartphones as early as 4 pm the day before their arrival and receive an automatic notification when their room is ready. When they arrive, Marriott Rewards guests simply go to the expedited mobile check-in desk where their key card will be ready and waiting for them. Marriott Hotels began testing mobile check-in at 31 properties just three months ago. Adoption has been rapid as one-quarter of Marriott Rewards guests with reservations at those hotels used the Marriott Mobile app to check-in. The app makes it easier than ever to simply tap to join Marriott Rewards, as well as gain immediate access to mobile check-in at Marriott Hotels, room-ready alerts, and other services available only to Marriott Rewards members exclusively on the app. Mobile check-in is part of the free Marriott Mobile app available in the Apple iTunes Store and Google Play. Learn more about mobile check-in and download the app http://www.marriott.com/marriott/mobile-check-in-marriott-hotels-and-resorts.mi Mobile is Marriott's fastest growing consumer channel. Mobile accounts for 10 million visits per month, and the Marriott Mobile app has been downloaded 2.3 million times. Last year, mobile devices (smartphones and tablets) accounted for over $700 million in revenue. Marriott mobile revenue has grown more than 80 percent during the past year. What's Next? In its drive to co-create the future of travel with its customers, Marriott Hotels solicited feedback from users of the app about what is most important to them. Based on this feedback, Marriott plans to add mobile checkout in November, including the option to have folios emailed.