How we use what we know about you.

Cultural Layers is a product of Praecise Ltd, a company registered in England and Wales (number 15567058), with its registered office at 86-90 Paul Street, London, England, EC2A 4NE. Praecise Ltd is the controller of the personal data described here. Cultural Layers is by Rivier, which is also a product of Praecise Ltd.

An account, if you create one: your name, your email address and a password, which is stored only as a salted hash.

Your Cultural Passport: what you tell the Assistant about yourself (for example a diet, a like or a dislike) with the sentence it came from; what you looked at, chose, booked, cancelled and reviewed; and tastes worked out from those.

Your conversations with the Assistant, and a record of each decision it made in them.

Your bookings, your calendar entries, the addresses of any calendars you connect and the events read from them, your reviews, messages between you and a host, and notices sent to you.

A mobile number, if you give one, with the channels you chose for messages.

If you host: your listings, the pictures you upload, the rules you set for your agent, and what your agent said in your name.

To provide the service you ask for (finding, planning, booking, messaging): performance of a contract with you.

To remember your tastes and shape what you are shown: our legitimate interest in making the service useful, which you control. You can see, correct and delete every memory in your Passport, and delete them all.

To keep the service safe (rate limits, records of decisions and bookings): our legitimate interest, and legal obligations where they apply.

Dietary and access needs can reveal information about health or belief. We use them only to find what suits you and, when you book, to tell the host what the booking needs. You can delete them at any time.

A host, and a host's agent, receive only what a booking needs: the time, the number of people, and any dietary needs you have stated. A host never sees your Passport. Messages you write to a host are seen by that host.

The Assistant and the agents are software. They choose what to show you and can prepare a booking, but nothing is booked until you confirm it, unless you have given a standing permission in your Passport, which you can withdraw. No decision with a legal or similarly significant effect is made about you by automated means alone.

The service is designed to use the following, each only when it has been switched on; where one is not connected, nothing is sent to it. Rivier (also Praecise Ltd): models and messaging. Skerry: payments. Living Worlds: a copy of Passport events and memories, and simulations of a planned day. Mapbox: maps and walking times; when a map is shown, your browser contacts Mapbox. Brave Search: the words of a search for things nearby, never your identity. Twilio, through Rivier: messages to the number you gave.

At the date above, none of these is connected: the service runs on its own, no payment is taken, and no message leaves it.

We do not sell personal data and we carry no advertising.

On servers operated by Praecise Ltd.

For as long as you use the service. Deleting a memory deletes it. You can export your Passport as a file from the Passport page. Deleting a whole account, and fixed retention periods, are not yet built: until they are, write to us at the address above and we will do it by hand.

Under UK data protection law you may ask for access to your data, for it to be corrected or erased, for its use to be restricted, to object to its use, and to receive it in a portable form. You may complain to the Information Commissioner's Office (ico.org.uk). To exercise a right, write to Praecise Ltd at its registered office.

Cultural Layers is offered to people everywhere and is run from the United Kingdom, where your data is kept. We give everyone the rights described above, wherever they live.

If you are in the European Economic Area, the General Data Protection Regulation gives you the same rights, and you may also complain to the data protection authority where you live. We have not yet appointed a representative in the European Union.

If the law where you live gives you further rights (for example to know what is collected, to delete it, or to opt out of its sale: we do not sell it), write to us and we will honour them.