Everything in one place
Lab sheets, patient portals, home devices — your values end up scattered. Vitametr keeps every measurement in one consistent, long-term record.
No account • Works offline • Open source
Your health values over time, under your control
Lab results, home measurements, wearable readings — Vitametr brings them into one timeline, shows trends against reference ranges, and stores everything only on your device. No account, no cloud, no tracking.
100%
Private
0
Network requests
Free
& open source
See it in action
From single results to a trend
The latest values at a glance, a chart with the reference band for every metric, comparisons and a printable report.
Why Vitametr
One record for every value
One record for every value
you've ever measured
Your data stays yours
Everything runs locally in your browser. Zero network requests while you use it — no server, no account, no telemetry.
Encrypted, if you wish
Choose a passphrase and everything is sealed with AES-GCM encryption. The app locks itself after inactivity.
Values with context
Charts show the reference-range band, trend and position against limits. Descriptive, not diagnostic — no interpretations, no advice.
Import & export
Batch entry like a lab result sheet, CSV import with review, full JSON backup and CSV export. Your data is never locked in.
Free & open source
Licensed under MPL 2.0. Inspect the code, suggest improvements, or just use it with confidence.
And in detail
Built for real health records
- Built-in catalog of common metrics — lipids, glucose, HbA1c, liver enzymes, TSH, vitamin D, ferritin…
- Your own custom metrics
- Result-sheet entry — one date, several values at once
- Grouped entry — blood pressure together with pulse
- Reference ranges from the source, kept with each value
- Unit conversions with UCUM codes (mmol/l ↔ mg/dl)
- Timeline of all events by date and source
- Minimum, average and maximum for any period
- Trend detection — rising, falling, fluctuating
- See which values haven't been measured for a long time
- Original source text preserved, never overwritten
- App lock with a passphrase
- Full JSON backup & CSV export
- Lab PDF import — processed entirely offline
- Installable app, works fully offline
- English and Czech, incl. decimal commas
Runs on your phone, tablet and computer — in any modern browser.
Getting started
Three steps to your health record
1
Launch
Open the app in your browser — it installs itself for offline use. No sign-up, no setup.
2
Record
Add values by hand, as a whole result sheet, or import a file. Ambiguous values go to review first.
3
See the trend
The overview, charts and timeline show how each value develops over months and years.
Start your long-term health record
Use Vitametr in your browser and install it as an app. Free and open source.
Works on Windows, macOS, Linux, iOS, and Android. Any modern browser.
Important: your data stays in your browser
Vitametr stores your measurements in your browser's local storage. Your data is private and never leaves your device — but that also means you are responsible for backing it up. Use the backup function regularly.
Tip: export a JSON backup after each session and keep copies in more than one place.
Not a medical device
Vitametr records and displays what you measured — it states only data-backed facts such as “above the source's reference range”. It never interprets results, makes a diagnosis, or gives treatment advice. Always discuss your results with your doctor.
Support the project
Vitametr is free and will always be free. If it helps you keep track of your health, consider buying me a coffee to support ongoing development.