Starwood plans to roll out refreshed SPG apps that can unlock your guest room later this quarter. The new tech, which the company refers to as "keyless key" in its intro video (embedded after the break), will soon let you bypass the front desk and enter your room using an Android 4.3 or iPhone 4s (or newer) device at the Aloft Harlem and the Aloft Silicon Valley. Existing locks must be upgraded in order to communicate with the Android and iOS apps via Bluetooth, according to a WSJ report, but Starwood's CEO says that the "investment would not be substantial."

Starwood currently offers a Smart Check-In solution at several Aloft hotels, but the existing system requires guests to obtain (and carry) a compatible membership card. It's also quite limited, with only nine hotels currently participating. Meanwhile, if this initial smartphone rollout is a success, your phone could be the key to all W and Aloft hotels worldwide by the end of next year.