MyFerment is the offline-first field logbook built for natural-farming ferments. Log a batch in twenty seconds — a photo, a tap, or your voice — and it tells you what stage it’s in and what to do next.
Natural farmers make FPJ, FFJ, LABS, and fish hydrolysate — living ferments on a clock. Yet the tools people reach for were designed for beer, for kimchi, or for math. None of them track a KNF batch through its stages.
Infinitely flexible, zero structure. No stage guidance, no reminders, and the notebook stays in the shed while the bucket’s in the field.
No sense of what’s dueBrewfather, Fermento and friends are polished — for beer, mead, kraut and kombucha. They’ve never heard of FPJ, and can’t tell you when to strain.
Not for farm inputsThe one KNF app is a dilution calculator with how-to notes. It’ll do the ratio math — but it doesn’t track a single batch over time.
Calculates, doesn’t logBuilt for one-handed use, standing over the barrel, with dirt on your phone and no bars of signal.
Pick the ferment type in a three-step wizard. It auto-names it and stamps a short code — FPJ-03 — so every jar is traceable.
Snap a photo, tap sensory chips, or just talk — voice notes transcribe themselves. Saves instantly, even fully offline.
It counts the days and shows plain-language expectations for exactly this ferment — plus the next action: Strain, Turn.
A health engine reads your notes and the clock, then flags every batch that needs attention today — before it’s ruined.
Everything below is shipping today — not a roadmap. It’s a focused tool that does the field-logbook job completely.
Warning chips and overdue stage actions roll up into one honest signal per batch — On track, Watch, or Needs action. Status is never color alone: every state carries an icon and a label.
the differentiatorCapture never waits on a network. Writes queue locally and sync to the cloud — idempotently — the moment you’re back in range.
works with no signalThree ways to record a moment: a transcribed voice note, a camera shot, or tap-to-select sensory chips tuned to each ferment type.
~20s per entryA built-in knowledge base — FPJ, FFJ, LABS, IMO, OHN, WCA, bokashi, hydrolysate and more — plus a fermentation blog, in a Learn hub.
reference on handA built-in dilution calculator and batch economics, in metric or imperial — so the ratio math and the cost per litre come along for free.
metric + imperialA proper PWA: add it to your home screen, launch it offline, and read it day or night with a real, low-glare dark mode.
PWA · dark modeMIT-licensed and self-hostable on your own Vercel, Turso and R2. No subscription, no lock-in, no one else holding your records.
View the source ↗An honest look at what natural farmers actually use today, and where each one stops short. We’d rather show you the gaps than hide them.
| MyFerment | KNF calculator | Brewfather | Food-ferment apps | Spreadsheet | |
|---|---|---|---|---|---|
| Purpose-built for KNF / farm ferments | ✓FPJ·FFJ·LABS | ~KNF, calc only | –beer / mead | –kraut / kombucha | –DIY |
| Tracks a batch through its stages | ✓day + stage | –no logging | ~for beer | ~for food | –manual |
| Works fully offline in the field | ✓offline-first | ~likely | ~syncs | ~varies | ✓paper / local |
| Fast capture — photo, voice & chips | ✓~20s | –no capture | ~manual entry | ~notes / photo | –typing |
| Built-in knowledge base | ✓26 guides | ~brief notes | ✓beer wiki | ~some | –none |
| Price | ✓free / MIT | ~~$4 once | ~free + ~$2/mo | ~free–cheap | ✓free |
| Your data — no account, self-host | ✓self-hostable | –store install | –vendor cloud | –usually account | ✓your file |
On the honesty of this table: competitors are moving targets — offline behavior, pricing and accounts change often, and a few cells here are conservative estimates. To the best of our research, no shipping product both targets KNF / agricultural ferments and tracks batches over time. If that changes, this table should too.
A tool that tries to be everything helps no one. Here’s where it deliberately stops — so you know exactly what you’re picking up.
No recipe-design engine, no Tilt or iSpindel hydrometer integrations. If you’re brewing to drink, Brewfather is your tool.
No livestock, crop planning, accounting or storefront. It logs ferments — it doesn’t run the whole operation.
Chips capture sensory signals, not instrument readings. No COAs, no calibrated pH / Brix logs, no compliance records.
Kraut, kombucha and sourdough aren’t its templates. The format could suit them — but that’s not who it’s built for today.
For hands-on natural farmers, market gardeners and KNF practitioners who want to remember what they did, when they did it, and what to do next — free, and yours to keep.