No sign-up, no app: how a room link works and what it does and doesn't know about you

The fastest way to lose a group decision is to make joining it a chore. If answering means installing an app, creating an account, and confirming an email, a third of the group will never get past the first step, and the decision will be made by whoever did. So the whole product is built around one rule: a guest needs the link and nothing else.

Here is what that actually means, and what it costs.

The link is the invitation

When you create a room, you get a link and an eight-character code. Either one opens the room. There is no sign-up on the other end: the guest types a name, answers the questions, and is done. On a phone, it is about a minute.

The link also comes as a QR code, for the situation where the group is in one place — a whiteboard, a shared screen, a phone held up across a table. Point a camera at it and the room opens.

The code survives being read aloud

The eight characters are drawn from an alphabet that leaves out the letters most easily confused with each other or with digits: no i, no l, no o, no u. What's left can be read down a phone, written on a napkin, or typed from a photo of someone else's screen without turning into a guessing game.

The code field on the site is forgiving in the same spirit. Paste the whole link and it finds the code. Type it with spaces or dashes and it strips them. Type a capital O where a zero was meant and it corrects it. A room code is for humans first.

What proves you're you

If nobody signs in, how does the room know that a second submission from you is a correction and not a second vote — or that only the host can close it?

When you create a room, your browser is given a host token; when you join one, a participant token. Each is a long random secret kept in a cookie that only the server can read — the page's own scripts never see it — and the server stores only a one-way hash of it, so a copy of the database contains nothing that opens a room. Your browser presents the token; the server checks it matches; that's the whole handshake.

The consequence is simple to state: you are whoever holds the cookie. Answer from a different device and the room doesn't know it's you — you'd be a new participant. That is the trade-off of no accounts, and for a decision that lasts a week it is almost always the right one.

What the results page reveals — and doesn't

Nobody sees anybody else's answers. Not the host, not the other participants, not before answering and not after. The host can see who has answered — so they know who to nudge — but not what anyone said.

The results page shows the group's decision and the reasoning behind it, and the reasoning is written so that it can name a person without exposing their answers. Mike preferred Comedy tells you Mike's genre pick didn't win; it does not show Mike's rating for every film. Anna can't accept this one tells you an option was ruled out and by whom, because a veto without a name would be a mystery; it does not show anything else Anna answered. The bar under the winner has one segment per person, coloured by how they feel about it — loves it, happy with it, not keen — and that is the whole of what a segment says about them.

What signing in adds, and what it doesn't

Signing in is optional and stays optional. It exists for exactly the things a cookie can't do:

• Find the rooms you made, later, from another device.
• Be told when someone answers your room, or when a room you're in closes.
• Save a room as a template and put it on a schedule.
• Hand the job of closing a room to someone else.

None of that changes what a guest experiences. A signed-in host's room is still opened by a link, answered without an account, and read the same way. The sign-in is the host's convenience; it is never the guest's obligation.

Why this shape

Every step between "here's the link" and "I've answered" is a place to lose someone, and the people you lose first are the quiet ones — the ones a group decision most needs to hear from. Removing sign-up isn't a feature. It's the difference between a room that reflects the group and one that reflects the three people who could be bothered.

Make a room, send the link, and count how many people answer within the hour.