Privacy | Know Your Chair

Short version: your weekly numbers live on your phone, and a copy is kept on our server so your own devices stay in step. You can switch that off whenever you like and the copy is deleted. There are no trackers on this site and no cookie banner, because there is nothing to consent to.

Last updated 31 August 2026. Know Your Chair is run from the United Kingdom. Questions go to hello@knowyourchair.com.

Your weekly numbers

Everything you log is written to your own device first, using IndexedDB, and the app keeps working offline on that copy. A second copy is kept on our server, so the week you log on your phone at the shop is there on your laptop at home.

That is on when you start, and we tell you so on the way in — it is a ticked box on the first screen, next to your name. Unticking it is one tap, and Options has the same switch whenever you change your mind.

Only you can read it. The rows are locked to your account by the database itself, so no other signed-in barber can reach them. Our staff are two people who could technically query the database, the same as with your email address — we do not, and we would not.
Stored in London, in the same Supabase project as your email address.
Off means deleted. Switch it off and the copy is removed rather than quietly kept. Your weeks stay on your phone and the app carries on exactly as it did.
Delete your account and it goes with it, automatically.
It holds the same seven numbers you typed in, plus tips and your shop deal. No client information, because the app never asks for any.
It is never read for anything else. Not for benchmarks, not for averages, not for research. It exists to show you your own numbers on your own devices.

With it switched off we cannot recover anything if you clear your browser data or lose the phone, because there is no copy to restore. Options has a backup file for exactly that, and it is worth saving one either way.

What we do store

What	Why	Where
Your email address	So you can sign in, and so we can reach you about the beta	Supabase, London
Whether you are subscribed	Nothing is charged today; the field exists for when that changes	Supabase, London
Waitlist details you chose to give: the first part of your postcode, your standard price, whether you rent or own	To report regional pricing averages, never published below three people in an area	Supabase, London
Your first name, if you give one when you sign in	So an email from us reads like it was written to a person	Supabase, London
Details you chose to give in the app: your town or city, how long you have been cutting, whether you are full or part time	To compare you against barbers working like you rather than one national average. Same rule — never reported below three barbers in an area	Supabase, London
Whether you ticked the box for the monthly email, and when	To send it, and to prove we had your permission	Supabase, London
Whether you asked for the Sunday reminder, and when	To send it, and to stop sending it the moment you say so	Supabase, London
That a reminder was sent to you in a given week	So a retry cannot send the same nudge twice. It records that an email went, never whether you logged anything	Supabase, London
Your weekly numbers — takings, cut price, cuts, hours, slots, no-shows, tips and your shop deal	So your own devices show the same figures. On when you start, and deleted the moment you switch it off	Supabase, London
Anything you send through the contact form: your email, what it was about, and what you wrote	So we can read it and reply. Kept so a message is not lost if the email fails to send	Supabase, London
If you report a problem from inside the app: which screen you were on, how many weeks you have logged, your screen size and your browser	To reproduce the bug. The app tells you this is being attached before you send	Supabase, London

That is the complete list. We do not hold your clients, your bookings, your bank details or your takings.

Everything in the app beyond your name is optional, asked once, and skippable. Nothing you answer is ever shown next to your name — it exists so a figure can say "barbers in Edinburgh in their first year" instead of "barbers".

Contact messages are kept while they are useful and deleted when they are not. Ask us to delete yours sooner and we will.

Cookies and tracking

There are none. No analytics, no advertising pixels, no session recording, no third-party tags, and since we started hosting our own fonts, no requests off this site at all while you read it. That is why you have not been asked to accept anything.

The app keeps your sign-in in your browser's local storage so you are not asked for a code every time. That is storage the app cannot work without, and it never leaves your device.

Companies we rely on

Supabase (London region) stores the email addresses above.
Render serves this website and the app.
Resend sends sign-in codes and any email we write to you.
Nobody else. The typefaces used to come from Google, which meant your browser told Google you were here. They are now served from this site. Loading a page of ours contacts no third party at all.

What we will never do

Sell your data, or share it with anyone for marketing.
Ask for your clients' names, numbers or appointments.
Show your figures to a shop owner, or build anything that ranks barbers against each other by name.
Leave a copy behind after you have switched syncing off.
Read your figures for anything except showing them back to you. No benchmarks, no averages, no training anything on them.

Your rights

Under UK GDPR you can ask for a copy of what we hold, ask us to correct it, or ask us to delete it. Since what we hold is an email address and a few optional details, that is a short conversation. Email hello@knowyourchair.com and we will action it within 30 days.

You can delete everything the app holds at any time from Options inside the app. That removes it from your device immediately.

Our basis for holding your email is your consent, given when you signed up. Our basis for holding your weekly numbers is providing the service you asked for — an app that works on more than one device. Either way you can end it: switch syncing off, or ask us to delete your account.

The monthly email is separate, and separately consented to. It is unticked by default, you are not on it unless you tick it, and every one we send has an unsubscribe link. Unsubscribing does not touch your account.

The Sunday reminder is separate again, with its own tick and its own one-click link. Turning one off never turns the other on or off. Neither affects sign-in codes, which only ever arrive because you just asked for one.

Worth saying plainly, because it is the sort of thing people assume: the reminder is not triggered by you failing to log. It goes to everyone who asked for it, on the same evening, because with sync off we have no way of knowing who logged and we did not want to build one.

If you think we have handled your data badly, you can complain to the Information Commissioner's Office at ico.org.uk.

Changes

An earlier version of this page said your weekly numbers would never leave your device. They now do — to your own account, so the app works on more than one of your devices. That was decided while the app had three accounts on it and all three were ours: nobody was using it, so nobody had a setting changed behind their back.

What has not moved: you are told on the way in, switching it off deletes the copy, and your figures are never read for anything but showing them back to you. If any of that changes you will get an email before it happens, not after.