17H reads the data your sports watch collects every day — HRV, recovery, VO2max, sleep — and turns it into a readable picture of your biological aging, with concrete guidance on what to do about it.
A single Premium subscription: the full product catalog matched to your metrics, trend tracking over time, and every feature as it ships — no tiers to compare.
Launch price available for early sign-ups only — reverts to the regular price after your first 3 months.
Your device exports charts, scores and trends — but turning them into concrete decisions about your long-term health remains a job no app truly does. The result: months of collected data, zero actions taken.
We connect your training data to recognized aging indicators, paired with targeted recommendations — including supplements chosen for your profile, not generic ones.
Export your activity history from Garmin Connect (or your platform of choice) — a couple of clicks, no manual data entry.
Activities → Export CSVA model translates your metrics into biological aging and training-load indicators, highlighting where the trend drifts from your own baseline.
HRV trend −12% / 90dGet specific ideas — training load, recovery, targeted supplementation — built for your profile, not the average user.
3 priority actionsA simplified, one-off preview of the 17H rule engine — nothing here is saved. Two things are needed to run it: your current metrics, and your training history.
This runs entirely in your browser. Nothing is uploaded or stored anywhere — for a version that saves your results, create an account.
People who've accumulated years of training data and want to understand its real impact on their longevity, not just their next race.
People with limited time who want prevention based on real data and clear decisions, not generic magazine advice.
People who already track everything and finally want a system that connects the numbers to concrete, personalized recommendations.
Enter your email — we'll send you a sign-in link, no password needed. From there you upload your data once and get a personal page you can come back to.
Already signed up? Use the same form — it works for returning athletes too.