You want to keep your family well this summer.
You want to take care of yourself, too.
But the days move quickly, and the question slips past.
"I'll ask later," you think — and then it's evening.
This little app is for that small forgetting,
held gently.
One summer afternoon, my grandmother wasn't well.
"I've been drinking tea," she said. And she truly had.
The amount, only, had quietly fallen short of what she'd imagined.
Not to scold, not to blame.
Just to ask, quietly, from the next room.
"Had a sip today?"
Just that. And the summer is different.
So I made this small companion.
Japan's Ministry of Health, Labour and Welfare, through its "Drink Water for Your Health" campaign, places the daily water guideline for adults at about 1.2 litres. Tea and soup count, too — but how much we actually drink tends to drift from what we imagine.
Source: MHLW, "Drink Water for Your Health" campaign.
Tea in the morning, miso soup at lunch, barley tea at dusk.
Yes, you are drinking.
But if someone asked how much, in a day,
most of us would pause before answering.
This isn't a question to scold you.
Just — being aware of one small sip changes the shape of a summer.
Not a medical device. Not a diet tool.
Just a quiet companion that asks, twice a day.
Once in the morning. Once at dusk. "Had a sip today?" — that's all.
Tea, miso soup, barley tea — the everyday drinks of Japan, shown in a form you can see, at your own pace.
One purchase reaches your family. Even across distance, the same question, at the same hour.
Actual app screens. No ads. Just one breath of quiet.
Your favourites, right at hand. Each sip quietly adds to today's gentle progress.
Your sips become a gentle graph. No scolding — just the flow, visible and calm.
Water by default, with Houjicha, Sakura, Ocean, Forest, Sunset, Night. Quietly switch when you like.
In the morning, open the app. Today's question is waiting, quietly.
Choose one thing you drank. Tea, barley tea, miso soup — all of it, just as it is.
At evening, the question returns, gently. To close the day, softly.
That's all. Hardly any setup, hardly any sign-in.
Quietly, honestly, at your side.
Yes. Water, green tea, barley tea, miso soup — the everyday drinks of Japan are shown as they are, at your pace. Alcohol is excluded because of its diuretic effect.
The initial value is set gently, drawing on the Japanese Ministry of Health, Labour and Welfare's guideline of about 1.2 L per day for adults. Bodies and climates differ, so please treat it as one gentle reference, not a rule.
Yes. The morning and evening question work without a connection. Your records are stored only on your iPhone.
Only twice a day. Once in the morning, once at dusk. You can adjust the times to your liking, or turn notifications off entirely.
No. Your personal records live only on your iPhone. We do not collect them. We do not use them for ads.
No. Hitokuchi is not a medical device. It is not intended to diagnose, treat, cure, or prevent any disease. It is an everyday companion for reflecting on your hydration. If you feel unwell, please consult a physician or pharmacist.
No. Apple's Family Sharing lets up to six members of the same group share the purchase, but each person's records stay on their own device — they are not shared between family members. Everyone receives the same gentle question at the same time, and answers it at their own pace. The design is deliberate.
One small question keeps your summer — and your family's — gentle.
