Chapu
Free- 3 buddies: Chapu, Mochi and Miso
- Tracking, reminders, the collection and backup stay free.
- A small banner ad on some screens
A cozy water tracker. Tap a drink and watch it fill Chapu the capybara, one colorful layer for each drink. No numbers to stress about, just a little friend getting fuller.
Free to download · No account · Your data stays on your phone
1.56 L to go. Sip with me?
Try it: tap a drink
Chapu talks to you like a friend, never like a coach.
Ahh, so refreshing!
One tap logs a glass, and Chapu fills up a little.
Water break! Chapu is waiting with a towel.
A gentle nudge, only while you're awake, and skipped if you drank recently.
Goal reached! I earned a yuzu 🍋
Goal reached. Chapu earns a yuzu, the steam curls up, and your streak grows.
Chapu, Mochi and Miso are free. Kiwi, Waffle, Boba and all 12 zodiac buddies come with Chapu Plus.
capybara
Chill, cozy, never in a hurry
panda
Sleepy, sweet, loves a long soak
kitten
Curious, cuddly, naps after every drink
alien
Came from far away to learn about water
robot
Runs on water, counts every drop
axolotl
Smiley, splashy, happiest in water
rat
ox
tiger
bunny
dragon
snake
horse
goat
monkey
rooster
puppy
pig
From barley tea and Thai tea to bird's nest and sugarcane juice. Tea and coffee count a little less than water, so your day stays honest.
Real screens from the app.




About every two hours, only during the waking hours you set, so your sleep stays quiet. Chapu skips a nudge if you just drank and goes quiet once you hit your goal.
Worked out from your weight, how active you are and how warm it is where you live. Change it any time.
See your week or month at a glance and share it as a picture: best day, favourite drink, days you hit your goal.
Every drink you logged can be saved as a CSV file to open in Excel, Numbers or Google Sheets.
Glugs, slurps, a goal chime and a little voice for every buddy. Turn them on when you like; they start muted.
Cozy, Dark, Sakura, Matcha, Snow, Maple, Cocoa and a Japanese Night, or just follow your phone.
Keep a streak to unlock cherry blossoms, a snowy onsen, a starry night and more. Add a rubber duck, a head towel or a bird friend.
Tap to put on or take off. Mix as many as you like.
Chapu Plus is a one-time unlock. No subscription.
There's no account and nothing to sign up for. Your drinks are saved on your phone, and you can back them up to a file whenever you like.
Chapu is available in seven languages, and so is this page.
Yes. Tracking, reminders, the collection and backup are free forever. Free users see a small banner ad. Chapu Plus is an optional one-time purchase that adds 15 buddies, every theme, your full history and removes ads.
Chapu is coming to Android first, on Google Play. An iPhone version is planned for later.
No. Open the app and start sipping. Everything stays on your phone.
About 33 ml per kilogram of body weight, plus a little more if you're active or live somewhere hot. You can set your own number at any time.
No. Chapu is a friendly habit app. If you have a health condition that affects how much you should drink, follow your doctor's advice.
Chapu is warming up the water.
Free to download · No account · Your data stays on your phone