Longevity science, on the hardware you already own.
Bring the health data you already have into one long-term picture. See how your health is changing against your own baseline, and get practical plans you can act on.
Start with the devices you already own. Glucose monitors and lab results are optional.
Fourteen tools, one picture of your health.
Wear a continuous glucose monitor for a month and Vitality Tracker draws your meals, fasts, training and nights on the glucose line, so a high morning has a visible cause. Then compare: pick any two or three meals you have logged and see their three-hour curves side by side, with the peak rise, the two-hour exposure and the dip that follows, which is the crash behind the next snack. Oats with banana against scrambled eggs is a different breakfast once you have seen it.
Choose the Playbook that matches your goal, Weight Loss, Minimal Viable Health Habits, Longevity, Metabolic Health, Keto Diet or Essential, and the targets, floors and daily asks across the app follow from that one choice.
45+ biomarkers across seven domains, from VO₂max and HRV to satiety and sleep regularity, each kept per device, read against your own baseline, and entered by hand when no device supplies it.
Tap a near-black screen when you are awake, up or back in bed, without properly waking, and in the morning your taps sit over your device’s sleep stages, showing which wakings it caught and which it missed.
Vitality Tracker’s AI health coach reads your biomarkers and lab results, explains them in plain language with the evidence behind each statement, screens its own advice for misinformation risk, and describes rather than diagnoses.
Log training by duration and effort, and protocols such as sauna, cold exposure and breathing practice, so what you did is always beside what it changed.
Start and end a fast with one tap, watch the window run, and keep every fast on record with its length and timing beside your glucose, weight and sleep.
Ingredients become recipes, recipes become meals and meals become a weekly plan, with NOVA class, glycemic index and load on everything, and your intake feeding the engine that learns your real energy expenditure.
Set the weight you want and when, and the planner sets a daily target from your own measured energy expenditure, holds a floor it will not go below, and adjusts as your weight actually moves.
A short daily check-in on stress, energy, mood and body discomfort, on validated scales where one exists, that becomes measures in their own right and context for everything your devices record.
Run supplements as regimens, daily, weekly or cyclical with planned breaks, track adherence against your biomarkers, and have every addition checked for interactions with the rest of what you take.
Give your doctor time-limited, read-only access and a pre-visit report of what has changed and since when, so the appointment starts from your data rather than your memory.
The weekly meal plan writes its own shopping list, quantities scaled to your servings, so the plan you made is the food in the house.
Reminders to step on the scale, take a blood-pressure reading or book the next lab panel, timed to how often each measure needs refreshing, so no part of your picture goes stale.
Alarms set to your local sunrise and sunset for morning and evening light, with each one you keep logged, so light timing becomes a tracked habit rather than a good intention.
Most health tools answer the wrong question.
An annual blood test is a snapshot. A readiness score tells you about today. Neither can tell you whether your physiology has quietly settled somewhere new over the last three months, which is the change that matters most and the easiest to overlook.
Medicine 2.0 waits for symptoms and treats disease. Medicine 3.0 measures continuously, intervenes early and treats lifestyle, meaning sleep, food, movement and stress, as the first prescription. Vitality Tracker is built for the second model.
Put today’s reading in context. Compare your resting heart rate across weeks, months and the year.
Population ranges say whether you look like other people. Your own baseline says whether you are changing. VT standardizes every measure against you.
VT's composites, like the Capacity Score, are built from measures you can see, with the study behind each one a click away. Nothing is a black box.
A tracker that stops at a chart leaves the hard part to you. VT closes the loop: goal, plan, forecast, correction, and an experiment when you want proof.
Measure. Understand. Act. Share.
A loop, not a dashboard: what you do feeds back into what you measure.
Connect what you already own. Any wearable or scale that writes to Apple Health or Google Health Connect, a glucose monitor such as the Sibionics GS3 or from Libre or Ottai, blood results from a PDF, and manual entry for anything else. 45+ biomarkers across seven domains, each kept per device and never blended.
See every measure against your own baseline and in context with the rest. Eir reads the trends, correlations and lab panels and explains them in plain language, with the evidence behind each statement.
Turn a goal into targets with floors you should not cross. Nutrition, supplements, training and recovery, set as plans, scheduled as regimens, and tested with an N-of-1 experiment when you want to know it works for you.
Give your clinician or coach a one-page pre-visit report or time-limited, read-only access, so the appointment starts from your data rather than your memory.
Level. Velocity. Trajectory.
Most apps tell you whether today's number is high or low. Vitality Tracker asks three questions about your own data.
Every measure is standardized against your own recent baseline, so a change is a change for you, not against a population average.
Day-to-day momentum across several measures at once, shown quietly in your vitals band, so a run of off days is read in context rather than one morning at a time.
The question a 2026 Stanford-led case report in JACC: Case Reports put in front of the world: a coherent, durable step away from a person's own baseline, visible on two devices, months before anyone looked. The Trajectory Layer we are building will look, week by week, and give you a one-page summary your doctor can read in a minute.
Vitality Tracker describes and tracks your measures against your own history. It does not diagnose, predict or monitor any disease.
One platform for the measures that decide healthspan.
Track what matters to you and ignore the rest; the more you record, the sharper the picture.
Body composition, nutrition and energy balance, activities and lifestyle, metabolic health, cardio-respiratory health, stress, rest and recovery, and circadian health. Device-measured, journaled and computed, from VO₂max and HRV to satiety and sleep regularity.
More →Upload blood results and see them beside everything else you track. Computed indices include PhenoAge, Pace of Aging, FIB-4, the Systemic Immune-Inflammation Index and vascular age. DNA reports, condensed by Eir into something you can read.
More →Ingredients become recipes, recipes become meals, meals become a weekly plan and a shopping list. NOVA, glycemic index and load on everything. An adaptive engine learns your true energy expenditure from intake and weight change rather than trusting a watch. Fasting windows are detected automatically.
More →Daily, weekly and cyclical regimens with planned skip periods, adherence tracked against your biomarkers, and a reorder engine so a bottle never runs out mid-regimen. Every claim is screened for misinformation risk before it reaches you.
More →Session-RPE training load, a Physical Condition Journal of functional benchmarks (grip, dead hang, broad jump, wall sit) and a Capacity Score that answers "what can I handle today?" in Base, Build or Peak terms.
More →Duration, staging, regularity and inferred sleep need, with regularity treated as the first-class signal recent cohort evidence shows it to be. Guided breathing and body-scan practices for the nights that need them. Circadian phase and rhythm quality are next.
More →Does magnesium improve your deep sleep? Does Zone 2 move your HRV? Run a guided single-subject trial, with hypothesis, baseline, intervention and a statistical readout, and get an answer for you rather than for the average participant.
More →State a goal as targets and safety floors. Five Playbooks at launch: Weight Loss, Minimal Viable Health Habits, Longevity, Metabolic Health and Keto Diet. VT forecasts where the plan takes you, with honest confidence bands, and corrects it against what you actually did, not what you intended.
More →Time-limited, read-only access and pre-visit PDF reports for your GP, specialist, coach or family. Role-specific dashboards for professionals.
More →Eir reads your data like a careful scientist, and shows its working.
Eir is Vitality Tracker's AI health coach. It analyzes your biomarkers and lab panels, finds the trends and correlations worth your attention, condenses a 20-page DNA report into a page you can read over coffee, and turns all of it into suggestions grounded in evidence you can check. Two things make it different.
Every nutrition and supplement claim, including Eir's own recommendations, is screened against Diet-MisRAT, a peer-reviewed misinformation-risk framework (Ruani et al., Scientific Reports, 2026), for inaccuracy, incompleteness, deceptiveness and potential for harm. As far as we know, no other consumer health platform audits its own advice this way.
Eir is an interpretation partner, not an alarm system. When something is worth a professional's eye, it says so and points you there.
No proprietary ring required.
The tools of data-driven longevity have mostly been priced for the affluent: premium hardware ecosystems, expensive lab panels, concierge clinics. Vitality Tracker starts from the opposite premise. A thirty-dollar body-composition scale and an entry-level band are enough, and the member with a single inexpensive device is our canonical user, not an edge case.
Every feature checks it has enough data before it switches on. If your device cannot supply a signal, the feature stays quiet instead of inventing a number.
An Oura night and an Apple Watch night are never blended into one figure. Trends are read within a device, and a device change is marked, never hidden.
Blood pressure from a cuff, a DEXA result, a lab PDF, a tape measure: there is a form for each, and manual entries sit beside synced ones with their source shown.
Premium will cost less than most gym membership, because a tool meant to be used for decades cannot be a luxury.
A companion app for iOS and Android handles daily capture, meals, fasting and Health sync; the analysis lives on the web, because a large screen matters for this kind of work.
Built to be shared with your doctor, in a form a doctor can use.
Your data only becomes useful in the consulting room when the person treating you can see it. Vitality Tracker gives your GP, specialist, coach or a family member time-limited, read-only access, and generates a pre-visit report that shows what has changed, over what period, and the questions you want to ask. The Trajectory Layer we are building will add a one-page summary of your long-term trajectory that a clinician can read in a minute.
Role-specific dashboards for clinicians, coaches, nutritionists and care facilities, with the method behind every number documented. Vitality Tracker describes; you diagnose.
Learn about the practitioner program →
The formula and the literature behind every computation are one click away. You see why, not just what.
Confidence bands instead of point estimates. When the data is not good enough to say something, VT says nothing rather than something false.
Trends are segmented at device and firmware boundaries and never pooled across sources, so a new watch never looks like a new you.
Composite indices such as PhenoAge, FIB-4 and SII, validated instruments such as PSS-4, and the N-of-1 design come from the research literature and are cited inline.
Every engine runs on the founder's own multi-year data and proved on group of select testers before it reaches a member.
Vitality Tracker describes and tracks physiological measures recorded by your own consumer devices against your own history, for general wellness and for discussion with a health professional. It tracks measures, not disease, and does not diagnose, predict or monitor any disease.
Your data is yours. All of it.
- —Encrypted in transit and at rest.
- —Export your complete dataset whenever you like, as CSV.
- —Nothing is shared without your explicit, revocable consent, and every share is time-limited.
- —No advertising and no data brokers: subscriptions are the business model, not you.
- —Stored and processed in Australia, by a New Zealand company under the Privacy Act 2020.
I built Vitality Tracker because I couldn't buy it. I have worn a ring, a watch and a glucose sensor for more than a year, run month-long device comparisons on myself to find out which ones tell the truth, and none of the apps behind them would give me one honest picture of where my own physiology was heading. So I built the tool I wanted, then left a good career to work on it full time. It is self-funded, built in Auckland, and every engine in it runs on my data, my family's and a group of select testers before it runs on yours. If a number can't show its evidence, it doesn't ship.
Join the invitation-only beta.
Vitality Tracker is in invitation-only beta with members in New Zealand, Australia and Europe. The beta starts with the companion app for iOS and Android; the web platform opens to members as each part of it is ready. Everything is free during the beta, members get a direct line to the founder, and they have a say in what ships next. Premium pricing will be announced before public launch and will stay below the cost of a gym membership.
Invitations go out in small batches so every member gets a proper onboarding; we will email you when yours is ready.
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Invitations go out in small batches so every member gets a proper onboarding; we will email when yours is ready.
We've also emailed you a link to confirm Last Week: Longevity.
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We will email when your invitation is ready.
We've also emailed you a link to confirm Last Week: Longevity.
Questions, in your words.
No. A scale that measures weight and body fat and a basic band with heart rate and steps are ideal, but every biomarker can be entered by hand. VT treats a single inexpensive device as a complete setup, not a compromise.
Anything that writes to Apple Health or Google Health Connect, which covers Apple Watch, Oura, Fitbit, Polar, Withings and most others, plus direct integrations we add over time.
Sibionics GS3, FreeStyle Libre 2+ and Ottai today, with every reading stored at full resolution. Dexcom are in progress.
No. Vitality Tracker describes and tracks physiological measures recorded by your own consumer devices against your own history, for general wellness and for discussion with a health professional. It does not diagnose, predict or monitor any disease. Bring what you see to your doctor; VT makes that easy.
Yes, and the beta starts with it: a companion app for iOS and Android for daily capture, meal and fasting logging and Health sync. The analysis lives on the web, which opens to members as it is ready, because a large screen matters for this kind of work.
Free during beta. After launch, a free tier plus Premium tiers that include a monthly allowance of Eir analysis, priced below some gym membership.
Stored in Australia, encrypted at rest and in transit, exportable in full as CSV at any time, and deleted on request. We never sell it and never show you advertising.
Yes, when you choose: time-limited, read-only access, and a pre-visit report you can print or send. It costs them nothing; practitioner accounts are free, for good.