One File · Powerful fitness tracker
Every block.
Every key session. Race day.
A marathon training tracker in one HTML file. Blocks, sessions, training-stress balance — for the runner who actually wants to know if they're peaking or overtrained.
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 marathon training needs a real log.
Volume isn't training; pacing volume is.
Training-stress balance reveals overtraining.
Acute load (7d) vs. chronic (28d) ratio — the gauge surfaces overtraining before the legs do. Coaches charge £150/month for less data.
Race-day banner counts down with intent.
Phase-aware advice (base / build / peak / taper) shifts automatically as race day approaches.
By-type donut keeps the easy days easy.
Most runners junk their easy runs. The donut shows whether you actually run easy on easy days.
Multiple blocks for the year ahead.
Spring half + autumn marathon + winter ultra all live alongside each other.
from base to taper
real distribution by type
no recurring fee, ever
log post-run with no signal
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 session 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.
Tier progression
Lifetime totals roll into satisfying tier badges as you log.
By session type
Visual split across categories so the pattern becomes obvious without squinting.
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.
PNG share cards
One-tap share card of your stats, ready for Instagram or a group chat.
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
Blocks
Every block, in one place.
Name, race distance, race date, peak weekly km per row. Sortable, searchable, groupable.
- Search across name, block notes / plan
- Sorted by race date (A→Z)
- 6 fields per entry — the right amount of detail
Sessions
Every session, in one place.
Date, session type, distance (km), time per row. Sortable, searchable, groupable.
- Search across notes
- Sorted by date (newest first)
- Group by session type with one tap
- 9 fields per entry — the right amount of detail
How it's different
What you give up vs. coaching apps. An AI coach you'll ignore by week 3.
Compared with marathon coaching apps.
- Pricing modelPay once · $8.99£8 – £15 / month, forever
- Account requiredNoYes
- Adaptive AI planNoYes
- Training-stress balanceYesOften paywalled
- Multiple blocksYesOften paywalled
- Data stays on your deviceYesNo
- Coaching upsellsNoYes
The promise
Your training is yours.
Not a coaching SaaS'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.
Will it generate the plan for me?+
No — that's an algorithm and a subscription. Bring or build your plan; the log is for executing and adapting it.
GPS / heart rate auto-import?+
No. Type the session — the act of writing makes the log reflective. Watch keeps the GPS trace; the log keeps the pattern.
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 that goes the distance.
We'll personalise a copy and email you a private link. Bookmark it, install it as an app, log this morning's run.
14-day refund · No subscription
