Personalized health intelligence

Understand your body.

Xerno turns wearable and health data into personalized, evidence-informed decisions for recovery, training, and everyday health.

Join the waitlist See how it works

Currently accepting early testers.

9:41Xerno􀛨

Training

Keep the session aerobic

Why

Your recovery signals are mixed. Zone 2 training is more appropriate than high-intensity intervals today.

Zone 245–60 minRPE 4–5

recoverytrainingModel

9:41Xerno􀛨

Recovery

Light movement only today

Why

Your sleep was shorter than usual and recent training load is elevated. A lower-intensity day may help you recover without becoming inactive.

Sleep 6h 12mLoad elevatedHRV steady

recoverytrainingModel

The problem

More data has not created more clarity.

Sleep scores. Readiness scores. Activity rings. HRV, resting heart rate, temperature, training load. You are measured constantly — and still left to guess what any of it means for today.

“Wearables are excellent at measuring. They are less useful at reasoning.”

You should not need five dashboards to decide whether to train, recover, or change your routine.

How it works

From raw signals to a reasoned plan.

Learn

Xerno builds a personal baseline from your health, behavior, and wearable data.

Reason

It combines multiple signals, context, and scientific evidence instead of reacting to a single metric.

Guide

It gives you a clear recommendation for today — and explains why.

Product

A clear read on your day.

Three views, one coherent picture. Examples shown below are product illustrations — not medical diagnoses.

9:41Xerno􀛨

Recovery

Light movement only today

Why

Your sleep was shorter than usual and recent training load is elevated. A lower-intensity day may help you recover without becoming inactive.

Sleep 6h 12mLoad elevatedHRV steady

recoverytrainingModel

Recovery

Light movement only today

Your sleep was shorter than usual and recent training load is elevated. A lower-intensity day may help you recover without becoming inactive.

9:41Xerno􀛨

Training

Keep the session aerobic

Why

Your recovery signals are mixed. Zone 2 training is more appropriate than high-intensity intervals today.

Zone 245–60 minRPE 4–5

recoverytrainingModel

Training

Keep the session aerobic

Your recovery signals are mixed. Zone 2 training is more appropriate than high-intensity intervals today.

9:41Xerno􀛨

Health model

What Xerno is learning

Why

Your recovery appears more sensitive to sleep duration than to isolated HRV changes.

12-week viewSleep-ledConfidence rising

recoverytrainingModel

Health model

What Xerno is learning

Your recovery appears more sensitive to sleep duration than to isolated HRV changes.

Product examples for illustration only. Xerno does not provide medical diagnosis.

The difference

Not another score.

Context over isolated metrics

Xerno evaluates patterns rather than treating one number as truth.

Explanations over commands

Every recommendation shows the reasoning behind it.

Learning over generic advice

The system adapts as it observes how your body responds over time.

Our story

Built from a personal obsession with what actually works.

A few years ago, I weighed almost 90 kilograms. I wanted to lose weight, feel better, and understand how to improve as quickly as possible. I tried conflicting advice, tracked everything, and became obsessed with identifying what actually worked.

Losing 20 kilograms changed far more than how I looked. It changed how clothes fit, how I moved, how I felt, and even how other people perceived me.

But the biggest lesson was that health advice is rarely personalized. The same recommendation can work for one person and fail completely for another.

I started building Xerno because I wanted a tool that could learn how my body worked, explain what mattered, and help me make better decisions without pretending that every metric was certain.

Anastasia Larionova

Founder, Xerno

Trust

Built for calibrated trust.

Evidence-informed

Recommendations are grounded in scientific evidence, not trends.

Clear explanations

You always see the reasoning behind a suggestion.

Confidence and uncertainty

Xerno shows how sure it is, rather than pretending to be certain.

Privacy-conscious by design

Your health data is treated as sensitive from the first byte.

No diagnosis claims

Xerno is a wellness product, not a medical device.

No engagement tricks

No streaks, no manipulation — just useful guidance.

Xerno is a wellness product and does not provide medical diagnosis, treatment, or emergency guidance.

Join the waitlist

Be among the first to understand your body differently.

Xerno is in early development. Join to help shape it and get access before anyone else.

Currently accepting early testers.