LAS VEGAS—Casino officials at Caesars Palace say they are launching a new iPhone app and allowing guests to check into the Las Vegas Strip resort through text messaging.

Casino operator Harrah's Entertainment Inc. says the new application and check-in system debut this month.

The iPhone app includes a customizable electronic postcard, resort information and the hotel's Twitter feed.

The check-in system is for guests who book online at the Caesars Palace Web site. Casino officials say guests will receive a text message the day before they arrive with their confirmation number. Those who reply "check in" get to skip lines the next day and receive their key after presenting identification.