Ask anything about your sleep, HRV, recovery, or body-composition goals. Metrya turns raw HealthKit numbers — plus today's weather and air quality — into clear, personal answers. Your AI, your key, your data.
HRV up 12% vs baseline. Good day to train hard.
Metrya on Apple Watch is a body-state companion, not a shrunken dashboard: your phone keeps the history and the AI, your wrist owns now. Reserve, recovery, your latest stress estimate, sleep, nutrition, caffeine, cold-plunge timing and a weather-aware Heads Up — all read on-device, the moment you raise your arm.
Check kcal, protein, carbs and fat against your daily targets with live progress bars — straight from your wrist.
Start and time a cold plunge from your wrist — it syncs to Apple Health when you next open the iPhone app. Sauna still starts from the phone.
HRV, resting heart rate and wrist temperature — each compared against your own rolling baseline the moment you wake.
Pin live Reserve, Recovery or heart rate to your watch face. The Watch talks only to your phone — no health data ever leaves your devices.
Here's an actual AI Advisor exchange — and everything that goes into it.
The flagship tools up top. Then everything else, grouped by what your iPhone works out on its own and what genuinely needs your AI key.
Most of Metrya never calls an AI at all — the scores are computed on your iPhone. Only the features in the second tab send anything to a model, and those run on your key, billed to you by the provider at cost.
One exception: if your iPhone supports Apple Intelligence you can pick it as your model and these features run on-device with no key and no cost — except photo meal analysis, which needs a Claude, OpenAI or Gemini key. Everything in the first tab never calls a model at all.
Metrya reads the HRV samples your Apple Watch already takes and turns them into an on-device estimate of autonomic strain, scored against your personal range. It is not a mood meter, not continuous, and not a diagnosis — and it says so.
The dashed stretch is a gap in your watch's HRV sampling — Metrya leaves it blank instead of inventing a reading.
A single 0–100 number that starts each morning from your overnight recovery, then drains and recharges hour by hour as you move through your day — like the battery icon you already understand.
Add a goal photo (or describe it, or pick a silhouette preset) and a current photo. Metrya reads both against your scale, sleep, and training data to map exactly what stands between you and the physique you're working for.
Metrya Pro surfaces science-backed aging signals inside the Bio Age screen. No extra sensors, no AI call, no server round-trip — just on-device math over your Apple Health history.
No account, no subscription, no data upload.
Most health AI apps charge $10–30 a month, quietly pocketing the difference. Metrya skips the middleman — you connect your own account in minutes, no technical background needed.
No subscriptions, no recurring billing. Pay once for Pro, own it forever.
Items marked · your key send data to an AI model and need your own Claude, OpenAI or Gemini key — billed to you by that provider at cost, typically under $2/month. Everything else is computed on your iPhone and costs nothing to run. How BYOK works →
Whoop, Bevel, Athlytic, Sonar and Livity all read the same handful of signals your Apple Watch already records — and most of them bill you every year for it, on their servers, with their AI.
Whoop's hardware is excellent — but if there's already an Apple Watch on your wrist, you're paying $199 a year to measure the same heart twice.
Read the comparison →Polished and broad, with its own AI coach. The trade: your health history lives on their servers, and the AI is theirs, on their terms, at their margin.
Read the comparison →The fairest fight of the three — Athlytic is cheap and privacy-respecting. It also stops at scores, where Metrya lets you actually ask why.
Read the comparison →Competitor pricing checked against public pricing pages and App Store listings in July 2026 and may since have changed. All trademarks belong to their respective owners, who are not affiliated with Metrya.
Everything you need to know before downloading.
Practical explainers on Apple Health, HRV, recovery, and privacy-first AI — written for people who want clearer signals, not more noise.
Recovery without the subscription — how to judge Apple Watch alternatives on readiness, energy, privacy, and multi-year cost.
Read article →Why soft HRV mornings aren’t always overtraining — and how to read environment next to Apple Health.
Read article →Three on-device lenses under biological age — which system is aging faster, and what to fix first.
Read article →Readiness in one place — when to push and when to recover, using your Apple Health data.
Read article →Here's what we're building next. If you bought Pro, all of it is included — no extra charge, ever.
The whole app in your language — screens, notifications and Watch included, with the AI answering in it too.
Months of daily history kept on your phone, so seasonality and long arcs finally have something to sit on.
A roomier dashboard for reviewing your full history on a bigger screen.
Download Metrya free, connect Apple Health, and get answers grounded in your own numbers — today.
Download on App Store