One File · Powerful health tracker
Your cycle.
Yours alone.
A private cycle and symptom log in one HTML file. Built for people who want to understand their patterns without trusting them to a cloud server, an advertising network, or whichever venture-funded app survives this year's pivots.
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 local
Why your cycle data shouldn't live on a server.
The local-first promise matters here more than anywhere else in the catalogue.
Cycle data is sensitive.
It tells a story about your body that nobody else needs. Period apps have already shown that 'don't worry about it' isn't a guarantee.
Patterns appear over months.
One cycle is noise; six months of cycles is signal. The tracker is for the slow build, not the panicked check-in.
Stealth mode for shared phones.
A built-in blur over sensitive numbers. Tap to reveal. Your cycle data isn't for the person glancing over your shoulder.
It works after the company doesn't.
If OneFileClub disappears tomorrow, your file keeps working. No 'sunset notice', no data export deadline, no migration.
realistic flow + symptom distribution
stamped, personalised, yours
no recurring fee, ever
no cloud, no third parties, no ads
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 today 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.
Most common (90d)
Ranked list updated every time you log — the leaders surface naturally.
Searchable, sortable list
Every entry findable in seconds — search across notes, sort by anything.
Rating system
Star or scale ratings per entry — the patterns surface in the dashboard.
Stealth mode
Blur sensitive entries with one tap when you hand the phone over.
Cross-entity links
Reference one entity from another — relationships stay intact across edits.
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
- Quick-add button — log without leaving the home screen
- Recent entries on the dashboard so the last log is one tap away
History
Every entry, instantly findable.
A clean list of every entry, sorted, searchable, editable. Click any row to revise it.
- Search across notes
- Sorted by date (newest first)
- 7 fields per entry — the right amount of detail
How it's different
What you give up by going local. The data brokers' commission.
Compared with mainstream period apps.
- Pricing modelPay once · $6.99£8 – £15 / month, forever
- Account requiredNoYes
- Data stored on your deviceYesNo
- Stealth-mode blurYesNo
- Sells / shares cycle dataNoSome have
- Ads in your cycle dataNoYes
- Survives a company pivotYesNo
The promise
Your cycle is no one else's business.
Especially not a server's.
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 tracker captures your data and shows patterns. If something concerns you, see a clinician — the tracker doesn't replace that.
Can I export everything?+
Yes. JSON or CSV at any time. The export is yours; we don't have a copy because there's nowhere for it to go.
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.
Yours alone, forever.
We'll personalise a copy and email you a private link. Bookmark it, install it as an app, log today.
14-day refund · No subscription
