How to access hotel amenities—with nothing but your smartphone.
Luxe: Need a parking spot? Luxe sends a valet to park your car for up to $15 a day. Available in San Francisco and Los Angeles; other cities soon. Free; Android, iOS.
Caviar: If you’re craving room service, use this app to order meals from top restaurants that don’t normally provide delivery. Free; iOS.
Zeel: Choose from a network of certified massage therapists—some employed by luxury hotels—and turn your living room into a spa. Free; Android, iOS.
Viator: You don’t need a concierge to book food crawls, cultural guides, and walking tours. Viator offers thousands of excursions around the world. Free; Android, iOS.