Comparison

Fermentation Journal vs Kombucha Keeper

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Fermentation Journal

Features
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Fermento keeps pickles, sourdough, cheeses, kombucha, charcuterie and more on schedule with smart timelines, reminders, calculators and exportable logs—for beginners and pros. Projects & timelines - Unlimited batches with custom milestones and photo notes - pH, salt %, weight and observations—timestamped in one place - Smart reminders for feeds, flips, checks and cures Culture management - Starters, SCOBY hotels and kefir grains—health, feeds and lineage together HACCP (for pros) - Decision-tree builder for hazards and CCPs - Monitoring/verification logs with corrective actions - Export tidy PDFs for audits and compliance Calculators & scaling - Hydration, salt %, inoculation ratios and timing helpers - Instant scaling and saved methods Insights - Compare batches, spot trends and review pH/tempo curves - Equipment notes and calibration history (keep sensors honest) Why Fermento? Made by fermentation obsessives. Private, focused and practical—whether it's your first kimchi or a full curing chamber. Terms of Use: https://drobinin.com/apps/terms/fermento/

About

Kombucha Keeper

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Kombucha Keeper helps you keep track of your Kombucha batches and notifies you when it might be ready.

Screenshots

Fermentation Journal4 screens
Kombucha Keeper3 screens

Verdict

The call

The clearest difference is in-app purchases: Kombucha Keeper at none against Fermentation Journal's 5. Kombucha Keeper also leads on iOS requirement (15.1 vs 17.0). Fermentation Journal's advantage is update cadence (monthly vs every 2 months). On price, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Fermentation Journal sells 5 in-app purchases, starting at $3.99 per 7 days. Kombucha Keeper asks for nothing beyond the download.

UpkeepUpdate frequency

Fermentation Journal ships an update monthly, Kombucha Keeper every 2 months. The most recent releases landed on September 10, 2026 and September 8, 2026 respectively.

Scorecard3 real differences · 3 level
Fermentation Journal versus Kombucha Keeper: the parameters behind the verdict, then further details
ParameterFermentation JournalKombucha Keeper
PriceFreeFree
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size105 MB23 MB
Age rating12+4+
DeveloperDrobinin LimitedWesley Dudok van Heel

In-app purchases

5 purchases

Fermentation Journal

Subscriptions4
  • Starter Culture Pro Weekly$3.997 Days
  • Culture & Probiotic Pro$7.991 Month
  • Culture & Probiotic Pro3 Days trial$59.991 Year
Show 1 more
  • HACCP Safety Compliance Pro$179.991 Year
One-time1
  • Lifetime (Personal)$199.99
None

Kombucha Keeper

No in-app purchases

Questions

Is Fermentation Journal free?
Fermentation Journal is free to download, with in-app purchases available.
Is Kombucha Keeper free?
Kombucha Keeper is free to download, with no in-app purchases.
Do Fermentation Journal or Kombucha Keeper have ads?
Neither Fermentation Journal nor Kombucha Keeper shows ads.
Which is updated more often, Fermentation Journal or Kombucha Keeper?
Fermentation Journal ships an update monthly, and Kombucha Keeper every 2 months. Most recently, Fermentation Journal was updated on September 10, 2026 and Kombucha Keeper on September 8, 2026.

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