Crown Reef

We used it as our room key even though they’re not promoting that yet and it worked great!

The app is just okay. If the performance was better it would be more useful. I've tried it on a new iPhone and Samsung Galaxy and it lags on both. The user experience can also be updated. Looking at the version history, there's never enhancements, only bug fixes every couple of years, so you can tell there's not a lot of focus on the app from Crown Reef. It's more of a low level design, not of professional quality with customer experience in mind. But again, it's only a 3 star hotel.