Starwood Hotels has allowed guests to use their iPhone as their room key since last November, and today announced that guests can now use the group’s Apple Watch app to unlock room doors at more than 100 properties. You can also use the app to get directions to the hotel and to check-in.

“We’re committed to mobile and digital innovation and are excited to be the first hotel company to let guests check in and open their hotel room door with their Apple Watch,” said Mark Vondrasek, Senior Vice President, Distribution, Loyalty and Partnership Marketing for Starwood Hotels & Resorts. “Apple Watch allows us to engage with our guests and give them the information they need instantaneously in a simple yet extremely stylish way. ”

For regular guests, the app offers two additional functions … 

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It can display details for up to four further bookings – displaying the hotel name, booked dates and photo – and receive alerts when new points are added to their Starwood Preferred Guest account.

Tim Cook said back in March that the Apple Watch would soon unlock doors at “some of the best hotels in the world.”

The Starwood Preferred Guest app is available today in English, with Spanish, Chinese and Japanese localizations coming soon. The app is a free download via the iPhone app on the App Store.