One File · Powerful food tracker
Every starter.
Every bake. Every ferment.
A sourdough & fermentation log in one HTML file. Wheat / rye / spelt sourdoughs, kombucha, kefir, kimchi, miso — and a starter-staleness banner that nudges you to feed before the danger zone.
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 fermenters end up with logs.
Living cultures want regular care; the log holds the schedule.
Starter-staleness banner kills the danger zone.
Active sourdough starters fed 3+ days late are weak. The dashboard flags any culture overdue — feed today.
Sub-ratings reveal what makes a great loaf.
Score + oven-spring + crumb each rated separately. After 50 bakes, hydration vs. crumb correlations are honest.
Multi-fermentation in one file.
Sourdough alongside kombucha alongside kimchi. Different schedules, same file.
Starter heritage preserved.
Where it came from, when it was born, who shared it. Decades-old starters travel through families.
wheat sourdough · rye starter · kombucha SCOBY
with hydration + score + crumb
no recurring fee, ever
log at the kitchen counter
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 feed 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.
Bakes by 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.
Photo per entry
Optional photo field stored locally as base64 — never uploaded.
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
Cultures
Every starter, in one place.
Name, type, born / acquired, currently active per row. Sortable, searchable, groupable.
- Search across name, notes / lineage
- Sorted by name (A→Z)
- Group by type with one tap
- 6 fields per entry — the right amount of detail
Feed log
Every feed, in one place.
Date, starter, ratio used, activity (1 sluggish · 5 doubling) per row. Sortable, searchable, groupable.
- Search across notes
- Sorted by date (newest first)
- 7 fields per entry — the right amount of detail
Bakes
Every bake / batch, in one place.
Date, type, hydration %, result per row. Sortable, searchable, groupable.
- Search across flour / ingredients, notes / mods
- Sorted by date (newest first)
- Group by type with one tap
- 11 fields per entry — the right amount of detail
How it's different
What you give up vs. baking apps. Recipe library.
Compared with sourdough subscription apps.
- Pricing modelPay once · $6.99£8 – £15 / month, forever
- Account requiredNoYes
- Recipe library built-inNoYes
- Starter-staleness bannerYesNo
- Multi-fermentation in one toolYesLimited
- Data stays on your deviceYesNo
- SubscriptionNoYes
The promise
Your starter is your heritage.
Not an app'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 remind me to feed?+
Browser notifications work. The dashboard banner is the primary nudge — open it daily and it tells you what's overdue.
Just for sourdough?+
All fermentation. Kombucha, kefir, kimchi, miso, koji, vinegar mother — all first-class.
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 culture's worth of memory.
We'll personalise a copy and email you a private link. Bookmark it, install it as an app, log this morning's feed.
14-day refund · No subscription
