One File · Powerful fitness tracker
Every round.
Every course. Every handicap point.
A golf round tracker in one HTML file. The unique trick: implements the full handicap-differential calculation (best 8 of last 20 × 0.96) — the same math the official handicap system uses.
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 golfers track rounds.
The handicap is the only number that actually matters.
Handicap-banner does the official math.
Best 8 of last 20 differentials × 0.96 — the standard formula. Builds automatically from 5+ rounds with course rating + slope.
Fairways / GIR / putts averages reveal patterns.
Hitting fairways but missing greens? GIR up but putts too high? The averages over 30 days isolate where the strokes go.
Score trend per round shows real improvement.
Across a season, the line moves down or stalls. Honest signal.
Course library survives clubs and travel.
St Andrews and your home muni in the same file. Yardages and slope ratings preserved.
across a season
with rating + slope
no recurring fee, ever
log on the 19th hole
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 round 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.
Most-played courses
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.
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.
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
Rounds
Every round, in one place.
Date, course, score (gross), fairways hit per row. Sortable, searchable, groupable.
- Search across notes
- Sorted by date (newest first)
- 11 fields per entry — the right amount of detail
Courses
Every course, in one place.
Course name, type, par, course rating per row. Sortable, searchable, groupable.
- Search across course name, country / region, notes
- Sorted by course name (A→Z)
- Group by type with one tap
- 9 fields per entry — the right amount of detail
How it's different
What you give up vs. Arccos / Garmin. Shot tracking via sensors.
Compared with shot-tracking subscription apps.
- Pricing modelPay once · $9.99£8 – £15 / month, forever
- Account requiredNoYes
- Per-shot GPS + sensorsNoYes
- Handicap calculation built-inYesYes
- Fairways / GIR / putts averagesYesYes
- Data stays on your deviceYesNo
- SubscriptionNoYes
The promise
Your rounds are yours.
Not Arccos's data.
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.
Official handicap?+
Self-calculated index using the standard formula. For an official certificate, register with your national body. For tracking improvement, this is what they use.
Per-hole tracking?+
Round-level totals (score, fairways, GIR, putts, penalties). Per-hole tracking is a different product — try if you want the depth.
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 handicap that builds itself.
We'll personalise a copy and email you a private link. Bookmark it, install it as an app, log Sunday's round.
14-day refund · No subscription
