App prototype, v0.1
From QR code
to cold water
without a receptionist.
Tap through the phone. Every screen answers one question, and the only black button tells you what happens next. The key and the session switch to Night: you are downstairs now.

21:025G
Amsterdam
Welcome
downstairs.
Sauna, plunge and a quiet room, one floor under your room. Sixty seconds to get in.
21:035G
Step 2 of 2
Three questions.
Heat and cold are strong stuff. A yes means no plunge today, not no visit.
Any heart condition?
Pregnant?
Alcohol in the last 3 hours?
21:045G
Sauna 86°Plunge 8°Free from 21:10
Tonight.
Tomorrow
21:045G
Private session
21:10
until 22:00 tonight
WhoJust me
Plunge12°, first visit
TowelsWaiting for you
Price€25 on room 412
Free cancellation until 21:00.
21:095G
Lift to −1, then
Hold your phone
to the door.
Valid 21:10 to 22:00 · Room A
21:145G
Heat
11:48
Sauna, 86°. Sit low the first time. A soft tone tells you when.
Heat 12
Cold 2
Rest 10
21:585G
How do you
feel now?
Same as beforeNew person
Would you have booked this hotel without minus one?
Towel in the basket, the door closes behind you. See you tomorrow at 07:00?