Know your longevity numbers.
Then add healthy years.
Get your lifespan, biological age, and a plan to change your trajectory — free.
Our methodology is built on CDC life tables and peer-reviewed research covering 40M+ participants.
Take Assessment →2 minutes · no email or credit card · answers never sold or shared
01 Measure
It starts with two numbers.
Your estimated lifespan shows the road ahead. Your biological age estimates how fast your habits are aging you, based on how you live, not the year you were born.
Example numbers: yours are calculated from your own answers.
02 Learn
Know exactly what to change.
You don’t just get a number. You see which habits are protecting you and which are pulling you down.
← makes you younger · ages you →
Your biggest lever: Diet, aging you about +2.3 years. The one area to focus on first.
Example profile: your habits will differ.
03 Improve
160+ ways to live longer.
Each cited, evidence-graded, and safety-checked.
Tap a habit to explore.
04 Track
It’s not about more years. It’s about more healthy years.
The number isn’t the point. The trajectory is. Re-measure over time and watch your biological age bend younger as your habits improve.
Illustrative: individual results vary.
05 Share
Longevity is better together.
Our mission is simple: help millions of people live longer, healthier lives. The best way to get there is together. Compare your numbers with the people you love, and help each other add healthy years.
Illustrative: individual results vary.
The whole thing. Free.
We’re giving the whole product away while we’re in early access. No card, no catch.
- See your lifespan estimate and biological age
- Discover your longevity archetype
- Re-measure anytime and see your change since last time
- Measure every habit’s impact in years
- Build a plan from 160+ healthy habits
- Track reps until a habit sticks
- Watch your check-ins connect into one trajectory over time
- Compare with people you love and count hangouts left
- Share your results with one tap
- Read the research behind every recommendation
- Save it all to your account
Longlevity Plus, a membership, comes later as we grow. Everything you see today is free.
It starts with your two numbers.
Take Assessment →Questions, answered.
Is it really free?
Yes, genuinely all of it, and no card required. Every Member gets their estimated lifespan, biological age, archetype, an action plan, the full 160+ habit library, unlimited re-measures, and their trajectory over time. Each check-in shows how you’ve moved since last time. We’re giving the whole product away while we’re in early access.
How accurate is it?
It’s a statistical estimate, not a prediction of your actual lifespan. It’s built on CDC life tables and peer-reviewed research covering 40M+ participants, with every recommendation cited and evidence-graded. We don’t inflate the numbers. Honest accuracy is the whole point.
Are you an AI company? Why longlevity.ai?
No. We’re not an LLM or an AI coach, and the “.ai” is just our web address. Your number is transparent actuarial math from CDC data and peer-reviewed research (inspect every step on our methodology page), never an AI guess. We use AI as a tool while we build the engine, but it never sees your answers or generates your result.
How long does it take?
About 2 minutes. Eleven quick questions, with your lifespan and biological age updating live as you answer. No account needed to get your result.
Is there an app?
Longlevity is a web app you can add to your home screen, where it opens full-screen with its own icon, just like a native app. There’s nothing to download and it’s always the latest version. On iPhone: open longlevity.ai, tap Share, then “Add to Home Screen.” On Android: tap the browser menu, then “Add to Home Screen.”
Do you sell my data?
Never. We make our money from you, not your data. That’s how the free experience stays free for everyone.