Bivryn reads your full Apple Health stream — sleep, HRV, recovery, blood work, supplements, behavior — and tells you what's actually moving your biology, in a calm editorial voice. Across every source you have: Apple Watch, Oura, Garmin, lab panels, your local weather.
The Bivryn difference
You can track sleep, HRV, steps, recovery — but still not know why you feel off today, whether coffee is affecting your sleep, or if your supplements are actually helping. Bivryn answers those questions using your own data.
Daily interpretation
"Your body is asking for a softer day."
Sleep debt and elevated overnight heart rate together — Bivryn names the contributors and suggests where to put your energy.
Lag pattern
"Hard workout Monday — HRV crash Wednesday is your 2-day lag pattern."
Bivryn now reads the 1, 2, and 3-day delays where the real signal often lives. The kind your wearable can't see in a single-day chart.
Recovery read
"Your HRV recovered fully — you're free to push."
Training capacity grounded in your own baselines, not a one-size-fits-all formula.
What Bivryn does
Sleep, HRV, resting heart rate, recovery, respiratory rate, wrist temperature, training capacity, travel impact — Bivryn synthesizes them into one calm sentence. Tap to see the drivers, the math, and what could shift.
Bivryn's recovery curve doesn't stop at "now." A dashed forecast line extends through the rest of your day, with a calm one-liner that names the shape. Drag your finger across the curve — each hour clicks with a soft haptic. Your day, as a tactile, anticipatory read.
A continuous biological-age reading composite from up to nine channels Bivryn can see — VO₂max, HRV, resting heart rate, walking heart rate, HR recovery, blood pressure, waist-to-height, sleep efficiency, and blood work when imported. Not a quiz. A living number that trends with your biology over weeks, scored against your own personal baselines and published healthy ranges. Computed entirely on your device.
Type a question in the search bar — why am I tired this week, what changed about my last 14 days, does coffee affect my sleep — and Bivryn reads across your full year of biology, your weekly logs, your weather, and your patterns to answer. Three contextual follow-ups appear below every reply. No chat-bubble feel. Just a calm editorial briefing on your data.
When today's biology matches a specific day from your own history, Bivryn surfaces what came next — the illness you were fighting off, the training block you started, the recovery that followed. Only possible with continuous years of your own data. The kind no single-year wearable can access.
Optionally invite up to 5 people to see a calm summary of your biology — never raw numbers, never dashboards, just a read of how you're doing. Encrypted end-to-end through Apple's iCloud. Pause or remove any connection any time.
Once a quarter, Bivryn picks a short set of physical tests based on your age, biology, conditions, and goals. Grip. Balance. Mobility. Endurance. Not the same four tests for everyone — a personalized read of how your body holds up, tracked over the years. Bivryn writes an editorial summary of what your trajectory says the moment you have two readings on record.
Every week Bivryn reviews new health research and surfaces only the findings that would change a decision for your medications, supplements, labs, and goals. Discipline over coverage — most weeks Bivryn ignores 10+ findings for every one it surfaces. The "ignored" count is displayed to earn your trust.
Bivryn continuously finds correlations across your behavior and biology — the kind you'd never spot manually. Discoveries now reads the 1, 2, and 3-day delays where the real signal often lives. The longer you stay, the smarter it becomes.
Try one change at a time — a new supplement, an earlier dinner, a training protocol. Bivryn captures your baseline, tracks adherence, and tells you honestly whether your biology actually moved.
Upload a lab PDF. Bivryn reads cholesterol, ferritin, vitamin D, hs-CRP, glucose, thyroid markers, hormones — connecting them to your sleep, energy, and recovery. Three lenses for hormone panels: cycle phase, mental-health context, and longitudinal drift.
Five breathing techniques (coherent, box, 4-7-8, physiological sigh, alternate nostril). Mindful walks. Eye rest. Light reset. Bivryn measures the HRV delta before and after, so you see what's actually working for your nervous system.
Travel, recovery streaks, supplement changes, training blocks, milestones. Bivryn keeps the story so you can look back six months from now and see what moved your biology — and what didn't.
Glance at your wrist for your body state and recovery curve. Pin today's focus to your Lock Screen. Ask Siri, "why am I tired today?" or "can I work out?" — Bivryn answers in calm prose grounded in your real numbers. Run a Bivryn Shortcut from inside ChatGPT or Claude — the integrations are already there.
Apple Watch
Glance + complications
Widgets
Home + Lock Screen
Siri + Shortcuts
9 App Intents
Live Activity
Dynamic Island
Privacy by default
Bivryn doesn't sell your data. We don't share it with advertisers. Your biological signals live on your iPhone and (optionally) sync only to your own iCloud account. You can export everything, or delete everything, with one tap.
On-device
SwiftData + optional iCloud sync. Never sent to our servers.
Portable
Export everything as JSON, anytime, from Profile → Privacy.
Deletable
"Delete all my data" lives in the app. One tap, full wipe.
Important
Bivryn is not a medical device.
Bivryn provides informational and educational insights about your biology. It is not intended to diagnose, treat, cure, or prevent any disease. For medical concerns, please consult a healthcare professional.
Trial code
Drop your email and we'll send you a free trial code when the next batch goes out. One email when your code is ready — no newsletter.
Different from the App Store's built-in 7-day free trial — trial codes go out to early adopters ahead of launch and unlock full access without a subscription.
One email when your code is ready. No newsletter.
Bivryn is available for iPhone and Apple Watch. 7-day free trial, then a subscription that unlocks new AI-generated interpretations.
Requires iOS 17 or later. Apple Health and Apple Watch supported.