I was at the Marriott Chicago Magnificent mile and had mobile key on my Android.
I think the Aloft SFO also had mobile key. But yes, out of 40 hotels I've stayed at this year (ballpark) those are the only 2 I can think of. Although the limitation is the hotel and not Android vs iOS
Last edited by Antarius; Oct 28, 2018 at 4:54 pm