Let your stress
ferment.
Choose a mood. Watch your vessel grow.
An iPhone journal that gives your everyday feelings a different shape.
Every recorded day advances maturity equally.
Keep each finished vessel together with the entries that shaped it.
Record moods manually · Apple Watch support is being tested
How do you feel today?
Give your stress
a little room to ferment.
You do not have to make a difficult day feel positive right away.
Try seeing those feelings as a slowly growing fermentation.
Record moods and notes, then look back at the vessel they have shaped.
A vessel for
your everyday feelings.
Every recorded day advances maturity equally.
Discover each new stage as your vessel grows.
Time brings a deeper color.
Fermentation is a way to reflect on your feelings. It does not represent real food fermentation rates or your health.
The image could not load. Choose another fermentation to try again.
Start free. Grow something new.
Nukadoko, miso, wine, and cheese unlock for free as you grow. Mood entries, reflections, and exports are free too.
Four vessels · One-time purchase
Four extra fermentations. Grow them again and again, with no subscription. The planned Japan price is ¥500; your local App Store shows the price in your currency.
Available when the app launches. Purchases do not change how fermentation progresses.
One small check-in.
That is enough.
You do not have to write a long diary entry.
Start with the word closest to how you feel.
Choose your mood
Calm, in between, or tense.
Pick the one that feels closest.Add a few words, if you like
Notes are optional. A mood is enough.
You can always edit it later.Watch it ferment
Your recorded moods shape the vessel’s changes.
Keep it close with a Home Screen widget.Make room for the days ahead
After 22 recorded days, your vessel reaches 100% maturity. Name it and keep it with its entries on your shelf.
Start the next batch whenever you are ready.
Your body’s signals,
another way to grow.
Apple Watch support
Experimental · Being tested on devicesWe are developing optional health estimates based on heart rate and heart rate variability to help shape your fermentation.
You can record moods manually without a Watch.
About health data and stress
Exercise, sleep, and other factors affect health readings. This feature does not directly measure stress or diagnose conditions. Device syncing and estimates are still being tested. When data is missing, you can select your mood manually.
A little fermentation on your Home Screen.
Illustration
A journal
just for you.
Your moods and notes stay on your device.
There is no feature for sharing them publicly.
The widget shows your vessel and its stage.
Moods shape its appearance, but mood values and notes stay private.
Device backups follow your iOS settings.
A few questions
Do I need to record every day?
Come back when you need to. On days without moods or health data, your vessel stays as it is. Missing days are never counted as low-stress days.
Is more stress better?
Maturity progresses at the same pace for every mood. Each recorded day counts once, and 22 recorded days complete a vessel. Moods influence its color.
Can I edit past entries?
Yes. Open an entry in Journal to edit or delete its mood and note. Saving again on the same day updates the entry; it does not add extra progress.
When can I try it?
The iPhone app is in development. A release date has not been announced. We will share the download link here when it is ready.
Let your days slowly ferment.
Kamosu is on its way.
The release date and download link will be shared here.
iPhone app in development
Explore the vessels again