Short, because there is not much to say. This site has no advertising network, no analytics tracker, no social pixels and nothing that follows you anywhere else.
Your email address is stored, along with which page you signed up from and the date. That is all — no name, nothing else.
It is not sold or rented to advertisers or data brokers, and it is not handed to other companies for their own marketing. It may be handled by services used to run the site and send the email, and those services may change.
Every email has a one-click unsubscribe link, which removes you immediately. If you would rather the address were deleted outright, ask and it will be.
Signing in stores your email address and the practice history from the trainers, so it can follow you to another device. There is no password, because there is no password to leak: signing in sends a one-time link that expires in twenty minutes.
What is stored about the session is a hash of the sign-in token, never the token itself. A stolen copy of the database could not be used to sign in as you.
The trainers keep your progress in your own browser's local storage so they work without an account and without a network. Clearing your browser data clears it. Nothing in there is sent anywhere unless you are signed in and have asked it to sync.
One cookie exists, set only after you sign in, holding the session identifier. It is httpOnly, so scripts on the page cannot read it. There are no advertising or analytics cookies of any kind, which is why you have not been asked to accept any.
Running a site needs a few services. Today they are:
These are the providers in use at the time of writing. They may be replaced by others doing the same jobs — an email provider in particular — without this page changing the day it happens.
If Sleightless is ever sold, merged or transferred, whatever is held here — including the mailing list and any accounts — would pass to the new owner as part of it. Your choices travel with it: the unsubscribe link keeps working, and you can ask the new owner to delete your data exactly as you can ask now.
Email [email protected] and say what you want. A copy of everything held about you, or its deletion, whichever you prefer. No form, no account required, no delay beyond the time it takes to read the message.
This page describes how things work today and may be updated as the site changes. The current version is always the one here.