citizenM is a free Android app designed by citizenM Hotels that simplifies the hotel experience. The app offers features for before, during, and after a stay. Before arriving at the hotel, users can check-in via the app and receive a complimentary welcome drink. The app also provides city tips from locals and stores stay history in one place, even if booked through other channels.

During the stay, users can go straight to their room with completed app check-in, control the room's lighting, blinds, and temperature, and stream shows and series to the room television. The app also allows users to browse food and drink menus.

After checking out, users can download their stay invoice right away and earn travel badges. The app offers more features than mentioned in this review.

Overall, the citizenM app is an excellent tool that streamlines the hotel experience. It's easy to use, and the interface is user-friendly. Download the app for a seamless stay at any citizenM hotel.