Last updated 2026-04-28.
LeanOS is a pre-launch waitlist site for an iOS coaching app. This page describes what we collect, where it goes, and how to delete it.
Your email address, when you submit the form. UTM tags from the URL you arrived through, if any, attached to the signup record as metadata so we can see which channels send the right audience. A referral token, if you arrived through someone else's referral link, so the right person gets credit.
Anonymous behavioral events. Page views, button clicks, scroll depth, share-channel selection, signup outcome. None of these events include your email address. We do not record your screen or session.
One automated confirmation message after you sign up. A small number of launch updates over the coming weeks, sent through the same waitlist tool. That is the entire mailing list. We do not sell your email or share it with third parties for marketing.
We use three processors. Each receives the data described.
Serves this site. Receives request metadata (your IP address, user agent, the URL you requested) for the brief moment it takes to render a page. Standard server logs are retained per Vercel's published policy. Vercel does not see the contents of your form submission outside of the time it takes to forward the request to our backend.
Stores your waitlist record. Receives your email, the UTM tags from your signup URL as metadata, and a referral attribution token if one was present. Sends the confirmation message. Your record stays in GetWaitlist until you ask us to delete it or until we migrate the list to a different system, in which case the receiving system inherits the same posture.
Records the anonymous behavioral events listed above and the UTM tags. The signup conversion event is also recorded server-side, from the same backend that talks to GetWaitlist, so that the conversion count survives ad-blockers. PostHog never receives your email address. Session replay is off.
We set a small number of cookies and one sessionStorage entry. The leanos_email and leanos_already_submitted cookies remember that you signed up so the confirmation page can show your spot. The leanos_ref cookie remembers a referral token from a friend's link for thirty days. The PostHog cookie (named ph_followed_by_a_token_followed_by_posthog) carries an anonymous identifier that lets us see whether the same browser came back. The leanos_utm sessionStorage entry holds your UTM tags for the duration of your browser session and is cleared when the tab closes.
Analytics are on by default. We have not added a cookie banner because the site does not run paid traffic in the EU. We will revisit before the first paid EU campaign and if organic EU traffic crosses a meaningful share of total traffic.
Email hello@leanos.app from the address on the list. We will remove your record from GetWaitlist and confirm by reply.
Reach us at hello@leanos.app.