Your health companion

Your whole health, in one picture — and what to do next.

Tell us about your health, add lab results and check-ins, and connect your devices (optional). Carthalis explains what it all means and helps you act on what matters.

Start freeSee how it works →

Free to start. Set up in a few minutes.

We will never sell your health data.

Carthalis on a phone beside a bed in soft morning light

Common reasons people start — and there are many more:

The Carthalis app on a phone: an overall health score of 76 out of 100, scores for six areas and a health age
The Carthalis app · sample data

140+ insights across seven areas of your health.

Each one explained in plain language and built on published research.

  • Body & fitness

    VO₂max · Strength · Body composition

  • Medical health

    Blood pressure · Glucose · Disease risks · Medications

  • Nutrition

    Diet quality · Daily energy needs · Fibre and sodium

  • Sleep & recovery

    Sleep regularity · Sleep efficiency · Overnight HRV

  • Mental health

    Stress · Mood · Anxiety check-ins

  • Longevity

    Heart age · Fitness age · Biological age

  • Environment

    Air quality · UV · Sleep environment

Works with Apple Health, Health Connect, Oura, WHOOP, Garmin and more. All ways to connect →

It notices what affects you.

Four examples among many · sample data

Your sleep, meals, symptoms, labs and devices, seen together — so Carthalis can spot your patterns that no single app sees. Four examples below; the same works for whatever you track.

Your migraines have a pattern.

7 of your last 9 migraines came after a short night followed by a drop in barometric pressure — the air pressure that shifts with the weather. Short nights or pressure drops on their own didn't show the same pattern. Chocolate didn't show up at all.

From your check-ins, sleep and local weather

Your last six weeks
  • Migraine
  • Short night
  • Barometric pressure drop

We only show you a pattern when your data supports it — and you decide what to do about it. See how we check carefully →

It helps you act — and shows what worked.

One example · sample data

A plan for your goal, help every day, and careful checks of what actually works for you. One example — the same works for any goal.

  • 1Your plan

    Your goal

    Fewer migraines

    1. Find your triggers
    2. Protect your sleep
    3. Keep what works

    This week: lights out by 10:30 before low-pressure days.

  • 2Your day

    Today

    • How's your head today?Morning
    • Vitamin D with lunchLunch
    • 10-minute walkAfter dinner
    • Pressure drops tomorrow — lights out by 10:30Evening

  • 3Something to try

    A check for you

    Want to check whether protecting your sleep before low-pressure days makes a difference?

    Six weeks as usual, then six weeks where we nudge an earlier bedtime the evening before a forecast pressure drop.

    StartNot now

  • 4What worked

    After your check

    Migraines

    Your usual weeks6
    With earlier bedtimes2

    2 migraines during the check, 6 in your usual weeks. A real pattern for you — not proof sleep is the cause, and the numbers are still small, so we'll keep watching.

    Did it feel that way?

    HelpedNo change

Your data stays yours.

  • We will never sell your health data.

    Not to advertisers, not to data brokers — and no other company gets your health data for its own use without your explicit consent.

  • You're in control

    You choose what to share, and you can export or delete everything at any time.

  • Stored securely

    Protected with encryption and access controls, and kept separate from your name.

A Canadian company.

All our promises →

Common questions

Carthalis is your faithful health companion. It brings what you tell us about your health together with your lab results, check-ins, logs and devices into one picture of you and what affects you, gives clear science-backed insights, and helps you focus and act. We will never sell your health data. Wellness education, not diagnosis.

No. We will never sell your health data — not to advertisers, not to data brokers — and no other company gets your health data for its own use without your explicit consent. Carthalis may recommend products or services, but a recommendation never hands your data to anyone. If you ever choose to join research or a future reward program, it is opt-in and explained first, and you can stop at any time. If a program pays for data you choose to share, you get a share. Our privacy policy has the details.

Carthalis applies safeguards appropriate for health information, including access controls, encryption in transit and secure storage. You choose what to add, and you can export or delete your data at any time. Our privacy policy explains what we collect, why, and your choices.

Your health data is never sold — not on its own, and not as part of selling the company. If Carthalis ever joins another company, your data only moves with the service, to a company that has agreed in writing to keep every promise in our privacy policy; otherwise it is deleted. We'll tell you at least 30 days before, so you can download or delete everything first. If Carthalis ever shuts down, you'll get at least 60 days to download your data, and then we delete it.

Not to start — but we encourage it. Connect Apple Health, Health Connect, a wearable or a glucose monitor (optional) and your picture gets richer: sleep, recovery, activity and glucose patterns that are hard to see any other way. Until then, Carthalis works from what you tell us about your health, your lab results, check-ins and logs.

Yes — you can start free, with no payment. Set up takes a few minutes, and your first picture appears on day one.

No. Carthalis provides access to tools to help you understand patterns and plan next steps for your wellness. It is not for diagnosis, treatment, or emergencies — always seek professional care for urgent or clinical decisions.

Your health makes more sense together.

Free to start. Set up in a few minutes.

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One account on the web, iPhone and Android.

Not ready yet? Try our free health calculators →