Cairn is a small software service that keeps a goal, your notes, and a weekly letter. It is not therapy, not coaching, and not professional advice, and it will never pretend to be. If you are carrying something heavy, please talk to a person trained to help; in the US you can call or text 988, and anywhere else, your local crisis line.
While early access lasts, Cairn is free and needs no card. When early access ends, it will be $9 a month or $49 a year in US dollars, with a 7 day trial. You can cancel any time from inside the chat; it stops at the end of the period you paid for. Missed days are never charged for. That is a rule of the product, not a promotion.
Use it as yourself, for your own goals. It is run best effort: there is no uptime promise, but your data can be exported or deleted at any time, and the service is built to be small and boring, in the good way.
If these terms change in a material way, the change will be announced in the chat or by email before it takes effect.
Everything here is meant in plain words and in good faith; questions go through the contact form.