Everything About Getting Younger

Immortals is the world’s first biological age network. It is a platform where you measure your biological age through the proprietary Immortality Index® scoring system, join a global leaderboard, and compete with others to get younger. Think of it as a fitness tracker for aging — except instead of steps, you are racing to reverse the biological clock.

Your chronological age is how many years since you were born. Your biological age is how old your body actually is based on its internal health markers. A 45-year-old who exercises regularly, sleeps well, and has excellent blood work might have a biological age of 37. A 35-year-old with poor metabolic health might biologically be 42. Biological age is the number that actually predicts your healthspan — how long you will live in good health.

The Immortality Index® is our proprietary scoring algorithm. It converts your health data — from lifestyle answers, wearable metrics, and blood biomarkers — into a single score from 0 to 1000. The higher the score, the younger you are biologically. The algorithm adjusts for your chronological age, geographic region, and urban environment to ensure fair comparison across the global network.

Immortals is operated by Kyklos Entertainment SRL, based in Bologna, Italy. The founding team includes expertise in epidemiology, software development, and health optimization. The algorithm is built on decades of peer-reviewed longevity research, including the landmark Hallmarks of Aging framework and leading epigenetic clock studies.

Immortals is not a health app. It is a biological age network. Most health tools give you data and leave you alone with it. Immortals turns your biological age into a score, puts you on a leaderboard, and creates a competitive environment where getting younger is a shared goal. The difference is the network: you measure, compete, and improve alongside thousands of others around the world.

Yes. All three measurement levels are completely free. The lifestyle interview (Level 1), wearable device integration (Level 2), and blood biomarker entry (Level 3) cost nothing. You bring your own data — your answers, your wearable, your blood test results — and we score it, rank it, and track it over time at no charge.

A future premium tier (Level 4) is possible, but the core three levels — lifestyle, wearable, and standard blood biomarkers — will remain free permanently.

Immortals does not sell or provide blood tests. For Level 3, you enter results from a standard blood panel that you obtain from your own physician or laboratory. In many European countries, these tests are covered by the national health system. Immortals charges nothing to process your results.

Each level adds more data and increases the accuracy and maximum possible score on the Immortality Index®:

• Level 1 — Lifestyle Interview: 10 questions, maximum score 400/1000, approximately 60% accuracy..
• Level 2 — Wearable Data: Manual entry of wearable metrics (heart rate, HRV, sleep, activity), maximum score 600/1000, approximately 80% accuracy..
• Level 3 — Blood Biomarkers: 6 standard blood markers, maximum score 800/1000, approximately 95% accuracy..

Level 1 is a 10-question lifestyle interview covering nine evidence-based factors linked to biological aging: exercise frequency, sleep quality, diet quality, body composition, smoking status, alcohol consumption, stress levels, chronic conditions, and family longevity. Your answers are weighted by importance (smoking and exercise carry the highest weight) and adjusted for your age, geographic region, and urban environment.

Level 2 data can come from any device that syncs to Apple Health or Google Fit. This includes Apple Watch, Fitbit, Oura Ring, Whoop, Garmin, Samsung Galaxy Watch, and many others. The data entry shows heart rate variability, resting heart rate, step counts, sleep patterns, and activity metrics to replace self-reported data with objective measurements.

Level 3 uses six standard blood markers that are available from any routine blood panel:

• HbA1c (glycated hemoglobin) — long-term blood sugar control
• Fasting glucose — metabolic health
• Triglycerides — fat metabolism and cardiovascular risk
• HDL cholesterol — protective cholesterol
• Total cholesterol — overall lipid profile
• hs-CRP (high-sensitivity C-reactive protein) — systemic inflammation

These markers cover the three pillars of biological aging: metabolic health, cardiovascular risk, and chronic inflammation.

Epigenetic tests (DNA methylation clocks) are expensive, require specialised laboratories, and produce results that most people cannot act on directly. The six biomarkers we use are accessible, affordable, clinically validated, and directly tied to modifiable lifestyle factors. If your hs-CRP is high, you can reduce inflammation through diet and exercise. If your HbA1c is elevated, you can adjust your nutrition. These markers give you a score you can actually improve.

No. You can participate with any level. Level 1 alone gives you a score and a leaderboard position. Each additional level increases the accuracy and maximum score you can achieve, giving you a competitive edge. But there is no requirement to go beyond Level 1.

The Immortality Index® algorithm processes your data and generate a weighted score. The specific weights and adjustment factors are proprietary and are not disclosed. The result is a score from 0 to 1000 and an estimated biological age.

A higher score means a younger biological age relative to your chronological age. A score of 750 indicates that your lifestyle, physiological data, and blood markers reflect a body significantly younger than your passport says. A score of 300 suggests there is substantial room for improvement.

More data means more certainty. Level 1 uses self-reported answers, which limits accuracy to approximately 60%, so the maximum score is 400. Level 2 adds objective wearable data, raising accuracy to approximately 80% and the cap to 600. Level 3 adds blood biomarkers for approximately 95% accuracy and the maximum free-tier score of 800. You are not penalised — you are simply rewarded for providing more data.

All members compete on a single leaderboard, regardless of their data level. Different entry procedure generate different level of accuracy and that is visible in the Immortality Index. Score rankings are based on your Immortality Index® score. You can view rankings across multiple categories: Global, By Nation, By City, By Age Group, By Environment, and Most Improved. A small icon indicates whether a member has interview, wearable or biomarker data.

The Immortality Index® updates instantly when new data is entered. Every time you retake the lifestyle interview, enter wearable data, or submit new blood results, your score updates immediately and the leaderboard reflects the change. This creates a continuous loop: measure, compete, improve, repeat.

Before you join the network, nothing leaves your browser. The Level 1 lifestyle interview stores your answers in your browser’s local storage only. When you choose to create an account and join the leaderboard, we store your username, score, country, city, and the data level you have provided. We never sell or share personal data. Full details are in our Privacy Policy.

Your raw health data (interview answers, wearable readings, blood values) is processed by the Immortality Index® algorithm to produce a score. Once scored, only the resulting score and metadata are stored. We do not store your individual blood values or wearable data streams on our servers. The algorithm runs server-side to protect its proprietary methodology, but your sensitive data is not retained.

Yes. Immortals is operated by Kyklos Entertainment SRL, an Italian company subject to EU data protection regulations. We comply with the General Data Protection Regulation (GDPR) including data minimisation, right to erasure, data portability, and transparent processing. See our full Privacy Policy for details.

The Immortality Index® is built on peer-reviewed longevity research, including the Hallmarks of Aging framework (López-Otín et al., 2013 & 2023), epigenetic clock studies (Horvath, 2013), and decades of caloric restriction and biomarker research. The specific weighting and algorithm design are proprietary. The index is a scoring tool for comparative ranking within the network — it is not a clinical diagnostic. See our Science page for the full research foundation.

No. Immortals is not a medical device, diagnostic tool, or substitute for professional medical advice. The Immortality Index® is an informational score designed for personal wellness tracking and social competition. It does not diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare professional for medical decisions. See our full Medical Disclaimer.

Level 1 provides an estimated accuracy of approximately 60%. Self-reported data has inherent limitations — people tend to overestimate exercise and underestimate alcohol consumption, for example. That is precisely why additional levels exist: wearable data replaces self-reports with objective measurements, and blood biomarkers provide clinical-grade biological insight. Level 1 is the starting point, not the destination.

Go to the homepage, choose your level, and get your score. If you want to appear on the leaderboard and track your progress over time, create a free account. That is it.

Yes. You can retake the lifestyle interview as many times as you want. Your most recent submission is the one that counts for your score. Retest anytime your habits change.

Absolutely. That is the entire point. Improve your lifestyle habits — exercise more, sleep better, manage stress, optimise nutrition — and your next measurement will reflect the change. Add wearable data or blood biomarkers to unlock a higher scoring range. The leaderboard shows a “Most Improved” category specifically to celebrate members who are making the biggest gains.

Our Science page provides a comprehensive overview of the research foundation, including the 12 most cited papers in longevity science and profiles of the 12 most influential researchers in the field.