Where this
came from.
I'm a software architect and database developer. I was diagnosed with MGMT-methylated Glioblastoma Multiforme (GBM), the most aggressive form of brain cancer.
After surgery, radiotherapy, and chemotherapy, I was left with something most patients aren't: a technical skillset, a research mindset, and a determination to take every possible measure to support my own recovery.
One of those measures was therapeutic ketosis — keeping daily carbohydrates below 50g to place sustained metabolic pressure on cancer cells that depend heavily on glucose. The evidence base for this in GBM is growing, and it became a non-negotiable part of my daily protocol.
But tracking it precisely — every day — while monitoring weight, HRV, sleep quality, and activity from multiple wearables, and connecting all of that data meaningfully, was beyond what any existing app could do.
"I didn't want an app that tracked my steps. I wanted to know whether yesterday's calories went to fat or muscle. I wanted to know if my ketosis was holding. I wanted my data to work for me — not sit in someone else's cloud."
So I built MaxedHealth. A web app that runs in your browser with no account required, no subscription, and no data leaving your device. The AI handles meal logging. The dashboard connects it all.
I've been using it daily ever since — in remission, still tracking, still improving. And now I'm giving it away.
Built for one.
Open to all.
MaxedHealth was built for GBM. But the moment it was finished, it was obvious it belonged to anyone managing a health condition through diet and data. The setup wizard now offers 27 ready-made starting points, from epilepsy and migraine to menopause and muscle growth. Pick one, and the lists and screens arrange themselves. Living with more than one condition? Add a second focus and keep it all in one place.
Your data,
working for you.
MaxedHealth is a nutrition tracker that connects to your wearable data. Log meals by typing, describing, or photographing them — the AI identifies macros instantly. A personal food library stores your regular foods with locked values, so one tap logs them precisely every time.
Tested with Withings, RingConn, Amazfit/Zepp, and Garmin. The dashboard plots weight, sleep, HRV, SpO2, steps, and body composition alongside your nutrition. In the free web app you type values in or import a file; Premium reads your wearables automatically.
It started with one condition and grew into something for anyone who wants to eat well, build muscle or simply understand their own body. Exercise is counted properly, from walks and rides to racket sports, swimming and lifting, with energy worked out net of what you would have burned anyway. Sleep is tracked night by night, stage by stage, and set beside your habits so you can see what seems to move what: a late meal, a hard session, a short night. Those are honest associations in your own data, labelled as such, never claims of cause. A Statistics tab lets you ask your own questions of your own numbers (your top foods, your best weekday, your heaviest lifts), choose how each answer looks and what colour it is, keep it, share it, or pin it to your Today screen. Not sure what a finding means for you? One tap gives a plain-English read of it, and the app speaks nine languages.
The question MaxedHealth is designed to answer: what is your eating actually doing to your body?
Free for you.
Not free for me.
The web app runs on free hosting, but the AI behind it is not free to run: every meal logged and every report generated goes through a real service that costs money per use. I have chosen to absorb that cost for the web app, rather than charge people for a tool that helps them manage a condition like mine.
Premium, a paid version that runs on your own Android phone, is what keeps the free one going. It adds the things that take real work to support: automatic wearable sync, device ranking, self-checks, auto-update, and setup help.
Here's how it compares to the apps charging £10–40 a month:
| Feature | Premium apps £10–40 / month |
MaxedHealth Free web app + Premium |
|---|---|---|
| AI meal logging (text + photo) | ✓ | ✓ |
| No API key required | extra cost | ✓ built in |
| Wearable data integration | limited devices | ✓ Withings, RingConn, Amazfit, Garmin tested (automatic sync is Premium) |
| Automatic wearable sync | ✗ | ✓ Premium |
| Therapeutic ketosis / GBM mode | ✗ | ✓ |
| Custom carb ceiling | ✗ | ✓ |
| Nutrition ↔ wearable correlation | basic | ✓ |
| AI monthly brief with trend analysis | ✗ | ✓ |
| Carer / clinician read-only view | ✗ | ✓ |
| Data stored on your device only | ✗ cloud | ✓ local only |
| No account required | ✗ | ✓ |
| No ads, no tracking | ✗ | ✓ |
| Works offline (PWA) | ~ | ✓ |
| Cost | £10–40 / month | Free web app; Premium priced fairly |
Your data.
Full stop.
No data is collected. No analytics. No advertising. No third party ever sees what you log. Six principles. No exceptions.
If you need hand-held onboarding and a live support chat, a paid app may suit you better. If you're technically comfortable and want something that genuinely respects your data and your intelligence — MaxedHealth was built for you.
Open it.
Right now.
MaxedHealth runs entirely in your browser. No installation, no account, no subscription.
Open Chrome on your Android phone and go to:
✓ No API key required. A free starter allowance of AI help is included.
Use Chrome's Add to Home Screen to install it: it then opens like any other app.
Premium runs on your own phone and syncs your ring or watch for you. It is set up with you personally, so there are no technical steps to follow. Register your interest and you will hear from me.
Ready to
start?
A free web app that runs in your browser.
No account required. Premium if you want it to do the typing for you.
If this helps you — whether you have GBM, T2D, or just want to know what you're eating — then it was worth building. No payment required. If you want to support the project, the best thing you can do is share it with someone who needs it.
— Pete Spence, software architect, retired Oracle DBA and RPA developer, GBM patient in remission.