Starting today, guests at ten Aloft, Element and W properties will have the opportunity to take advantage of a new SPG Keyless mobile entry system, essentially negating the need for a physical room key. The rollout comes on the heels of a pilot program that Starwood kicked off earlier this year, which saw the technology implemented at Aloft Hotels in Manhattan and Silicon Valley (fitting locations). By the end of 2015, the SPG Keyless system will be enabled at 150 locations, which Starwood says will comprise of 30,000 doors when all is said and done.

The entire process is actually extremely simple. After downloading Starwood's app, guests can check into their hotel of choice up to 24 hours ahead of their stay. A virtual key is provided, which then allows folks to go straight to their room and get in through Bluetooth technology—no checking in at the front desk required. You'll need to sign up for Starwood's reward program in order to take advantage of the keyless system, but that's free.

"Not only does SPF Keyless alleviate a perennial pain point for travelers, but it also transforms the first interaction with our guests from one that is transactional to something more personal," said Starwood CEO, Frits van Paasschen.

Although the SPG Keyless system will only be available at select locations, the implementation and ease-of-use sounds like a big step toward the future of hotel check-ins. Of course, you'll need to have your phone on you at all times in order to get into your room, and if your battery runs out you're kind of stuck with the old physical keycard. But Starwood's system is just another way our phones are quickly replacing bulky wallets.

Both iOS and Android users can download the SGP app, and you can see what hotels will support the technology at the source link down below.

Starwood is actually just one hotel chain working to implement mobile solutions. Earlier this summer, Hilton said smartphones should serve as room keys at its hotels sometime next year.