One File · Powerful productivity tracker
Every choice.
Every prediction. Every outcome.
A decision journal in one HTML file. Predict outcomes when deciding, score yourself when reviewing — the rationalist classic that calibrates your judgement across decades.
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 decision journals build judgement.
Most people overestimate their own predictions. The journal proves it.
Calibration % is the brutal trick.
Right=1, partly=0.5, no=0. The percentage tells you how reliable your gut actually is. Most are surprised — usually downward.
Stakes ladder forces honesty.
Small (reversible) → medium → large → huge (life-defining). Most decisions are smaller than you imagine; some are bigger.
Reviews-due upcomingList nudges follow-through.
Without the nudge, predictions are forgotten. The dashboard lists predictions due review in 60 days.
Lessons-learned becomes a personal playbook.
Captured at review-time, when the outcome is fresh. Patterns to remember; mistakes to avoid.
across career, money, health, house
small / medium / large / huge
no recurring fee, ever
private playbook
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 decision 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.
Tier progression
Lifetime totals roll into satisfying tier badges as you log.
By category
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.
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
Decision log
Every decision, in one place.
Decided on, decision, category, stakes per row. Sortable, searchable, groupable.
- Search across decision, reasoning, predicted outcome (be specific)
- Sorted by decided on (newest first)
- Group by was the prediction right? with one tap
- 14 fields per entry — the right amount of detail
How it's different
What you give up vs. journaling apps. Less brutality.
Compared with general journaling platforms.
- Pricing modelPay once · $8.99£8 – £15 / month, forever
- Account requiredNoYes
- Calibration scoringYesNo
- Predict + review structureYesLimited
- Stakes ladderYesNo
- Data stays on your deviceYesNo
- SubscriptionNoYes
The promise
Your judgement is yours.
Compounding privately.
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.
What's a 'good' calibration %?+
70%+ is exceptional. 50-70% is solid. Below 30% means you're more uncertain than you act — most discover this. The discipline improves it.
How long to review?+
Set 'review by' to when the outcome will be clear. Some predictions resolve in weeks (job offer); some in years (house purchase regret).
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 playbook that compounds.
We'll personalise a copy and email you a private link. Bookmark it, install it as an app, log the next big decision.
14-day refund · No subscription
