What this site is
LeanOS is informational. Submitting your email reserves a place in line for a future TestFlight cohort of the iOS app. Reserving a spot is not a purchase, an account, or a guarantee of access.
Last updated 2026-04-28.
LeanOS is a pre-launch waitlist site. By using it, you agree to the following.
LeanOS is informational. Submitting your email reserves a place in line for a future TestFlight cohort of the iOS app. Reserving a spot is not a purchase, an account, or a guarantee of access.
We will use your email to send you one confirmation message and a small number of launch updates. We will not share it for marketing. We will delete your record on request.
We do not promise a launch date, a feature set, a price, or a guaranteed TestFlight invitation. The cohort is small. The work is in progress. Anything on the landing page can change before launch.
Hosting, the waitlist record store, and product analytics each rely on third parties. The Privacy page lists them by name and explains what each receives.
Sign up with an email you control. Do not submit other people's addresses. Do not abuse the referral mechanic with throwaway emails. We can remove records that look like abuse.
We may update this page as the product evolves. The date at the top will reflect the most recent change. Continued use of the site after a change means you accept the updated terms.
Reach us at hello@leanos.app.