English
Download

Every sip fills
Chapu's hot spring.

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.

Coming soon onGoogle PlayLater foriPhone

Free to download · No account · Your data stays on your phone

1.56 L to go. Sip with me?

Chapu
0.44 L of 2 L

Try it: tap a drink

A day in the hot spring

Chapu talks to you like a friend, never like a coach.

  1. Morning

    Ahh, so refreshing!

    One tap logs a glass, and Chapu fills up a little.

  2. Afternoon

    Water break! Chapu is waiting with a towel.

    A gentle nudge, only while you're awake, and skipped if you drank recently.

  3. Evening

    Goal reached! I earned a yuzu 🍋

    Goal reached. Chapu earns a yuzu, the steam curls up, and your streak grows.

Pick a buddy to soak with

Chapu, Mochi and Miso are free. Kiwi, Waffle, Boba and all 12 zodiac buddies come with Chapu Plus.

  • Free

    Chapu

    capybara

    Chill, cozy, never in a hurry

  • Free

    Mochi

    panda

    Sleepy, sweet, loves a long soak

  • Free

    Miso

    kitten

    Curious, cuddly, naps after every drink

  • Plus

    Kiwi

    alien

    Came from far away to learn about water

  • Plus

    Waffle

    robot

    Runs on water, counts every drop

  • Plus

    Boba

    axolotl

    Smiley, splashy, happiest in water

Who's your zodiac buddy?

  • Plus

    Peanut

    rat

  • Plus

    Cocoa

    ox

  • Plus

    Mango

    tiger

  • Plus

    Dango

    bunny

  • Plus

    Wasabi

    dragon

  • Plus

    Noodle

    snake

  • Plus

    Caramel

    horse

  • Plus

    Latte

    goat

  • Plus

    Toffee

    monkey

  • Plus

    Pudding

    rooster

  • Plus

    Biscuit

    puppy

  • Plus

    Peach

    pig

27 drinks, not just water

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.

  • Water
  • Sparkling
  • Lemon water
  • Coconut water
  • Sports drink
  • Tea
  • Green tea
  • Herbal tea
  • Barley tea
  • Thai tea
  • Bubble tea
  • Jasmine tea
  • Oolong tea
  • Chrysanthemum tea
  • Lemongrass tea
  • Ginseng tea
  • Coffee
  • Milk
  • Soy milk
  • Yogurt drink
  • Juice
  • Smoothie
  • Sugarcane juice
  • Soda
  • Soup
  • Bird's nest drink
  • Grass jelly drink

Take a peek

Real screens from the app.

Today
Today
History
History
Collection
Collection
Your drinks
Your drinks

Little things that make it cozy

  • Reminders that read the room

    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.

  • A goal that fits you

    Worked out from your weight, how active you are and how warm it is where you live. Change it any time.

  • A recap card to share

    See your week or month at a glance and share it as a picture: best day, favourite drink, days you hit your goal.

  • Export to a spreadsheet

    Every drink you logged can be saved as a CSV file to open in Excel, Numbers or Google Sheets.

  • Cozy sounds, off by default

    Glugs, slurps, a goal chime and a little voice for every buddy. Turn them on when you like; they start muted.

  • Themes for every mood

    Cozy, Dark, Sakura, Matcha, Snow, Maple, Cocoa and a Japanese Night, or just follow your phone.

Chapu

Scenes and bath toys

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.

Scenes

Classic springWhere it all beganUnlocked

Toys

Tap to put on or take off. Mix as many as you like.

Free to enjoy. Plus if you want more.

Chapu Plus is a one-time unlock. No subscription.

Chapu

Free
  • 3 buddies: Chapu, Mochi and Miso
  • Tracking, reminders, the collection and backup stay free.
  • A small banner ad on some screens

Chapu Plus

One-time
  • 15 more buddies, including all 12 zodiac animals
  • Every theme, including Japanese Night
  • Your whole history, not just the last 4 weeks
  • No ads anywhere in the app
Pay once, keep it. No subscription, no ads.The price is shown in Google Play before you buy.

Your water, your phone

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.

  • No sign-up
  • Saved on your phone
  • Backup to a file

Questions

Is Chapu free?

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.

Which phones does it work on?

Chapu is coming to Android first, on Google Play. An iPhone version is planned for later.

Do I need an account?

No. Open the app and start sipping. Everything stays on your phone.

How is my daily goal worked out?

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.

Is this medical advice?

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.

Ready for a soak?

Chapu is warming up the water.

Coming soon onGoogle PlayLater foriPhone

Free to download · No account · Your data stays on your phone