Frequently Asked Questions

You answer 11 short questions about your habits, body, and family history. It takes about 2 minutes. We combine your answers with CDC life tables and research covering 40M+ people to estimate your lifespan and biological age, and to name your #1 lever: the one habit change worth the most years to you. The full method is on our methodology page.

It's an estimate, not a prediction. The numbers come from U.S. population research covering 40M+ people and are kept deliberately conservative. Things we don't measure, like genetics and medical history, matter too, so treat the result as a direction, not a verdict. We review new research every month and version every change on the methodology page.

No. Longlevity is an educational tool built on population research. It doesn't diagnose or treat anything, and it doesn't replace your doctor. Talk to a healthcare provider before making big changes to your health, diet, exercise, or medications.

No. The ".ai" is just our web address. Your estimate is never generated by AI: every number comes from CDC data and peer-reviewed research, computed by a transparent model you can inspect on our methodology page. We use AI behind the scenes to help review research and test the math. It never sees your answers.

One of seven patterns that describe the shape of your habits: The Burnout Runner, The Coaster, The Optimizer, The Stress Carrier, The Late Starter, The Blind Spot, or The Builder. It shows which habits protect you, which pull you down, and where to start. Your archetype is part of the Longlevity Report. More at longevity archetypes.

Adults who want an honest read on their health and a clear first step. It's designed for people 18 and older. Teens 13 to 17 should use it with a parent or guardian, and it isn't for children under 13. It's built for the United States; see the note on other countries below.

The assessment and your numbers, always: your estimated lifespan, your biological age, your #1 lever with its real number, the 160+ habit library, unlimited re-measuring, sharing, comparing, and a free account to save it all. No card, no trial. The report is optional.

The full analysis of one measurement, for a one-time $19: your archetype, every lever ranked by the years it's worth to you, your per-habit biological-age breakdown, your ten-year projection, and your next moves in order. It's a dated document, delivered to your email as a permanent link that opens on any device, yours forever. Re-measuring stays free, and a new measurement gets a new report with the year-over-year comparison. See an example report.

No. The report is a one-time purchase. We never charge you automatically, and there's nothing to cancel. Once a year we may invite you to buy a fresh analysis of your newest measurement. That's a choice, never a charge.

30 days, full refund, no questions asked. Use the link in your report email, or Request a refund from your account. Stripe processes it, and your saved data stays.

No. You can take the assessment and see your estimate and biggest lever without one. You only need an email to save your results or buy the report. There are no passwords: each sign-in email has a secure link and a 6-digit code.

Enter your email on the site and we'll send a fresh sign-in link. Open it on any device and your results and history load. You never need to redo the assessment to get back in. If you bought the report, the permanent link in your report email opens it on any device, no sign-in needed. If you didn't save, your browser keeps an in-progress assessment for 7 days and a finished one for 2 hours, on that device only.

Once a year. If you save your results, we'll invite you back around your birthday to re-measure, free. You don't have to wait for the invitation. Report buyers also get one check-in email about a week after buying. Every email has a one-click unsubscribe.

As long as you have an account, so you can keep tracking. If you get a refund, your data is kept dormant, not deleted. Each assessment snapshot is kept up to 5 years. People you add to Compare stay until you remove them, and compare links expire after 90 days. You can delete everything any time from the "Delete my data" link in any email we send.

Only what you give us: your assessment answers (habits, age, gender, height and weight), your first name if you enter one, your email if you save or buy, and anonymous usage analytics that never include health answers, names, or emails. No location, contacts, or browsing history.

Never. We don't sell, rent, or share your personal data for marketing or advertising. Your answers produce your results and nothing else. The only third parties that touch your data are the ones that run the service: Cloudflare (hosting), Resend (email), Stripe (payments), and Google (anonymous analytics and the site's typeface, with no health answers, names, or emails sent).

We use HTTPS everywhere, signed tokens for sensitive actions, and storage isolated per user. Longlevity is an educational tool, not a medical service, so it isn't HIPAA-covered, but we treat your data with more care than the law requires. Details: Privacy Policy.

Yes, in one click. Every email we send has a "Delete my data" link at the bottom. Click it, confirm, and everything is permanently removed: your results, purchase history, and all snapshots. We keep only your unsubscribe preference, as the law requires, so we never email you again.

Longlevity is a web app you can add to your home screen. It opens full-screen with its own icon, with nothing to download and always up to date. On iPhone: open longlevity.ai in Safari, tap Share, then "Add to Home Screen." On Android: tap the browser menu, then "Add to Home Screen." To sign in from the home-screen app, type the 6-digit code from your sign-in email.

Check spam first, especially on Gmail and Outlook. If it isn't there, request it again with the same email. Still nothing after 5 minutes? Email contact@longlevity.ai and we'll look. Common causes: work email filters, old forwarding rules, or a typo in the address.

Chrome, Safari, Firefox, and Edge, on desktop and mobile. Browsers older than 2021 may not render some features, like the compare view.

Yes, with a caveat. The baseline comes from U.S. CDC data, so in a country with a very different life expectancy your estimate may be off by a few years. The habit effects come from international research and apply broadly. Treat the number as directionally right.

Use the Feedback tab on the right edge of any page: what happened, which page, and what you expected. To send a screenshot, email contact@longlevity.ai with your browser and device. We read every report.

Email contact@longlevity.ai. We're a small team, so expect a reply within a day or two.

We're open to it. If you run a wellness program, health platform, or insurance product and want to offer a longevity assessment, email contact@longlevity.ai with "Partnership" in the subject.