Nuka Diary: Ferment Tracker

Daily reminders and easy fixes

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Open it, tap once, done. Your nukadoko gets stirred every day. Tell it what you smell or see and it tells you what to do. Ready-times adjust to season and storage. A rice bran bed rewards the hands that tend it. The hard part isn't the stirring — it's remembering whether you already did. Nuka Diary takes the remembering off your plate. OPEN IT, TAP ONCE One big button. Press it and today is logged. Your streak grows, so tomorrow you'll want to keep it going. In high summer the app quietly switches to a morning-and-evening rhythm; in winter it eases off. The pace follows the season so you only ever have to press the button. WHEN SOMETHING SEEMS OFF "It smells like paint thinner." "There's a white film on top." "It's gone too sour." Pick what matches and you get the cause, then the fix, step by numbered step. - why it happened - exactly what to do about it - whether it can wait or needs attention now Fourteen problems covered, including how to tell harmless white film from real mould. Knowing you don't have to throw it out is worth a lot on its own. CATCH THE RIGHT MOMENT How long for cucumber? For daikon? Does the fridge really double it? Twenty-four vegetables with their own timings, calculated from where you keep the bed (room temperature, a cool spot, or the fridge) and the time of year. You get a notification when it's ready. Rate each batch as you take it out — too shallow, just right — and the timing shifts toward how you actually like it. The longer you use it, the more it becomes yours. GO AWAY WITHOUT WORRYING Tell it how long you'll be gone and you get a checklist for before you leave and another for when you're back. Reminders pause while you're away. ALSO INSIDE - Home Screen and Lock Screen widgets with the countdown at a glance - Photos attached to records, so you can compare how it looked over time - iCloud sync, so your history survives a new phone - Works for shio koji, miso, kimchi, sauerkraut and more — eleven ferments in all - A guide covering how to start a bed, salt levels, and building umami - Japanese and English It's something you open every day, so it stays out of your way. A weekly plan is available if you'd rather have no ads at all. As long as your bed is alive, this app has a job to do. NO ADS PLAN (AUTO-RENEWABLE SUBSCRIPTION) - Name: No Ads Weekly - Length and price: renews every week / $0.99 (price varies by region) - Renews automatically unless cancelled at least 24 hours before the period ends - Manage or cancel any time in iPhone Settings, your Apple Account, Subscriptions Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy https://tatsu456.github.io/nukadoko-diary/privacy.html

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

The developer, TAKAYUKI TAKEMOTO, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers
    • Usage Data

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Identifiers
    • Usage Data
    • Diagnostics

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Location
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • TAKAYUKI TAKEMOTO
Size
  • 6.2 MB
Category
  • Food & Drink
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English and Japanese
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2026 Takayuki Takemoto
  • Developer Website
  • Privacy Policy

    • More by TAKAYUKI TAKEMOTO