One File · Powerful fitness tracker
Every reading.
Every trend.
A blood pressure log in one HTML file. Readings, context, medications — with the AHA-category banner that classifies your 14-day average automatically.
One payment · Yours forever · 14-day refund
- Works fully offline
- Installs as an app (PWA)
- No account, ever
- Yours, forever
Loads once, never needs the internet again. On a plane, in a basement, in a foreign hotel.
Every entry, every chart — stored locally. We never see it. We can't.
No subscription. No upgrades. No re-up next year. One file, yours.
Why log
Why patients end up with home monitors.
A single GP visit is a snapshot; two weeks of home readings is a film.
AHA-category banner is real signal.
14-day rolling average automatically classified Normal / Elevated / Stage 1 / Stage 2 / Crisis. The line a clinician will recognise.
Print-ready for the GP.
CSV export plus print-from-browser gives your GP clean data. Better than reading numbers off a phone in a 10-minute appointment.
Context per reading reveals triggers.
Stressed, post-meal, post-exercise, hangover — chips capture it. After a fortnight the patterns are obvious.
Day-of-week breakdown is honest.
Mondays and Fridays often spike. The bar chart reveals it without judgement.
morning + evening cadence
with realistic distribution
no recurring fee, ever
no insurance partner integration
Inside the file
Eight things you'll use every day. Plus a dozen more.
One file. One dashboard. Every feature you'd expect from a "real" app — without the cloud, the cookies, or the £8/month.
Quick add
Log a reading from the home screen — three taps and back to your day.
Live insight banner
The single number that matters today, computed in real time from your entries.
Streak calendar
Daily streak across the last weeks. Showing up becomes the default.
Searchable, sortable list
Every entry findable in seconds — search across notes, sort by anything.
Free-form notes
A textarea per entry for the things that don't fit a field.
PNG share cards
One-tap share card of your stats, ready for Instagram or a group chat.
Cross-entity links
Reference one entity from another — relationships stay intact across edits.
Light + dark theme
Auto follows the system, manual override available in settings.
Offline, always
Loads once, runs forever without a network connection.
Installs as a PWA
Add to home screen — opens like any native app.
CSV in / CSV out
Bring your old data in. Take everything with you. No lock-in.
No account, ever
No email, no signup, no analytics, no third-party tracking.
Yours forever
If we vanish tomorrow, your tracker keeps working — local file, no server.
Light + dark
Auto-follows the system. Or pick one and stick with it.
Today
Today, at a glance.
The home screen pulls together what just happened and what's coming up — clean enough to actually look at every morning.
- Live insight banner — your unique angle, computed from your entries
- Four-tile stat grid surfacing the numbers that matter today
- Streak calendar showing the last weeks at a glance
- Quick-add button — log without leaving the home screen
- Recent entries on the dashboard so the last log is one tap away
Readings
Every reading, in one place.
Date, time, systolic (top), diastolic (bottom) per row. Sortable, searchable, groupable.
- Search across medication taken, notes
- Sorted by date (newest first)
- 10 fields per entry — the right amount of detail
How it's different
What you give up vs. health apps. Insurance partnerships.
Compared with health-tracker apps.
- Pricing modelPay once · $6.99£8 – £15 / month, forever
- Account requiredNoYes
- Insurance partnershipsNoYes
- AHA category classificationYesLimited
- Print-ready for GPYesYes
- Data stays on your deviceYesNo
- Data shared with anyoneNoYes
The promise
Your readings are yours.
Not an insurer's risk model.
Offline, always
Open it once, never need the internet again. The file holds the whole app.
Local-first storage
Every entry stored in your browser, on your device. No server sync. No leaks. Nothing to breach.
One payment, forever
No subscription, no upgrade tier, no nag. If we shut down OneFileClub tomorrow, your file keeps working.
Data does not sync automatically between phone and desktop
This is a local-first app — everything stays on the device you logged it on. To use it on both phone and desktop, use the built-in JSON or CSV export on one device and import on the other when you want to keep them in step.
Every view, light and dark.
A look at every screen across both themes — your tracker, populated.
Questions
Real answers, no fine print.
Is this medical advice?+
No. The AHA category is mechanical (using published thresholds); only a clinician can diagnose hypertension. The log helps you bring real data to the appointment.
Does it sync with my BP cuff?+
No — that needs hardware integration. Bluetooth cuffs require their own apps. Type the systolic / diastolic; the trade-off is total privacy.
Where is my data stored?+
Locally, in your browser, on your device. Nothing is sent to OneFileClub or anyone else — there is no account, no cloud sync, no analytics.
Does it work offline?+
Yes. Once your personalised copy loads the first time, the entire tracker runs from a single HTML file. Airplane mode is fine.
What does 'personalised copy' mean?+
When you buy, OneFileClub stamps a private copy with your licence and deploys it to a unique URL just for you. You bookmark it, install it as an app, or save the file — and the file is yours, even if OneFileClub disappears tomorrow.
What is your refund policy?+
14 days, no questions asked. Email us, we'll process it and disable your private URL.
One payment.
A logbook for the next GP visit.
We'll personalise a copy and email you a private link. Bookmark it, install it as an app, take a reading tomorrow morning.
14-day refund · No subscription
