Frequently Asked Questions

ONU connects to the health platforms you already use — Apple Health, Whoop, and Garmin — and lets you upload lab results, then uses an AI health engine to find patterns across all of it. You get a daily ONU Score and a personalized action plan built from your own data. See the full product overview.

No. ONU is a general wellness app, and the ONU Bracelet is a general wellness device. Neither is intended to diagnose, treat, cure, or prevent any disease, and neither replaces a licensed healthcare provider. Always consult a doctor for medical concerns.

ONU is free to download and use for core tracking and daily insights. The full prevention-and-improvement engine — biomarker interpretation, deeper pattern analysis, and extended history — is part of ONU Pro, $16.99/month or $149.99/year. If you want the full hardware experience afterward, the ONU Bracelet is available for an extra $99. See full pricing details.

Inside the ONU app, after you download it — subscriptions can't be started directly from this website. This site and the pricing page show you exactly what you'll get and what it costs, so you know before you download.

No — ONU is a health-and-life-improvement company. The app (and the ONU Bracelet) are how that improvement gets delivered, but the goal is measured in better sleep, fewer sick days, and a better quality of life, not in app features. Read more about ONU's mission.

iOS is live today; Android is currently in waitlist.

ONU uses encryption in transit and at rest, strict internal access controls, and maintains compliance frameworks including HIPAA, GDPR, and ISO 27001. See the full Security & Compliance overview.

Apple Health, Whoop, and Garmin directly, plus the ONU Bracelet — and because most other trackers and wearables sync into Apple Health or export standard health data, ONU can typically work with data from other devices too, including if you're switching from a competitor. See the step-by-step connection guide for each.

Yes — upload a PDF, screenshot, or exported file of any lab results directly in the app, and ONU's AI health engine will extract and structure the relevant biomarkers automatically.

ONU reconciles overlapping data rather than duplicating it, generally favoring whichever connected platform is considered more reliable for that specific metric.

Total sleep duration is only part of the picture — sleep quality, consistency, and which sleep stage you wake up during all affect how rested you feel. Read the full explanation in Why Am I Always Tired?

There's no single universal number — different wearables calculate sleep scores differently, so your own trend over time matters more than comparing to a generic benchmark. Full detail in Sleep Score Explained.

Deep sleep typically makes up roughly 13–23% of total sleep in healthy adults, though this varies by age and individual factors — see the full sleep score guide for how to actually improve it.

Heart rate variability measures the variation in time between your heartbeats, reflecting the balance between your sympathetic and parasympathetic nervous systems. There's no universal "good" number — your own trend matters most. Full explanation in HRV Explained.

Generally 60–100 beats per minute for most adults, with well-conditioned athletes often lower. See ONU's full HRV and resting heart rate guide.

A moderate-intensity aerobic training zone, roughly 60–70% of estimated maximum heart rate, associated with building aerobic base fitness. Detailed in the HRV guide.

Not as a formal diagnosis — it's a popularized term. The genuine clinical condition involving excess cortisol, Cushing syndrome, is diagnosed through medical testing, not appearance. Full explanation in Cortisol and Stress.

Acute stress is short-term and resolves once the trigger passes; chronic stress is prolonged activation without adequate recovery, and is the type linked to burnout and allostatic load. See Acute vs. Chronic Stress.

There's genuine, still-developing research connecting chronic stress to cellular aging markers like telomere length, though it's not a precisely quantifiable relationship. More in ONU's stress and burnout guide.

Your total cholesterol minus your HDL — it captures LDL plus other cholesterol-carrying particles linked to cardiovascular risk, and is used by cardiologists as a more complete marker than LDL alone. Full breakdown in Blood Test Results Explained.

This is a known, studied difference caused by individual variation in glycation rate, not necessarily an error in either measurement. See the full explanation.

An estimate of how "old" your body functions, distinct from your chronological age, calculated through methods like epigenetic clocks, biomarker composites, or fitness measures like VO2 max. Full guide at Biological Age Testing.

Magnesium glycinate is the most commonly recommended form for sleep and relaxation, though large-scale, form-specific research is still limited. Full breakdown in ONU's supplement guide.

Most clinical studies use 300–600 mg per day of standardized root extract; talk to a doctor first, especially if pregnant or managing a thyroid condition. More detail in the supplement guide.

It carries a 1 ATM water resistance rating, suitable for everyday water exposure like handwashing and rain, but not for swimming or submersion. Full specs at ONU Bracelet Specs & Features.

Up to 22 days with normal use, extending to roughly 30 days in battery-saving mode.

Yes, the ONU Bracelet carries CE certification. Full details are on the Bracelet specs page.

Of all the metrics discussed under "biological age," cardiorespiratory fitness (VO2 max) has some of the strongest population-level research linking it to long-term, all-cause mortality risk. See ONU's full guide.

Generally several weeks to months of consistent training — it's a slow-responding metric, not something a single workout changes.

Yes — ONU for Companies brings full ONU Pro access, wearable integration support, and an optional Bracelet program to employee wellness benefits, without ever sharing individual employee health data with the employer.

Yes, through the ONU API, available to insurers, employers, and health-technology partners on a scoped integration basis.

Each has a different core model — Bevel is a software-only aggregator, Function Health and Superpower are lab-testing memberships that include the tests themselves. ONU combines continuous wearable aggregation with source-agnostic lab interpretation and first-party hardware. See the full breakdowns: ONU vs. Bevel, ONU vs. Function Health, and ONU vs. Superpower.

No — many people reasonably use a periodic lab-testing membership alongside ONU's continuous, daily tracking layer rather than treating it as an either-or decision.

Every claim across ONU's app and Health Library is checked against authoritative sources — the CDC, NIH, WHO, or peer-reviewed research, depending on the topic — before publication, and everything stays within a claims-safe, educational, non-diagnostic framing.

No — ONU is a general wellness product, and neither the app, the ONU Bracelet, nor any content on this site claims to diagnose, treat, cure, or prevent disease. ONU's role is to help you notice patterns worth discussing with a healthcare provider.

Every article in ONU's Health Library and every claims-sensitive explanation in the app is checked against primary, authoritative sources before publication, with the specific sources cited at the article level.

ONU Health is based in New York and primarily serves the US and UK markets, with the ONU Bracelet shipping to a broader set of regions.