Mitasu - Water Tracker
Hydration you can feel
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
Hydration that feels good.
Mitasu is a simple tracker for your daily water intake, where every glass fills the whole screen with water. The level rises as you drink, and the scene shifts as you get closer to your goal. You don't count it. You fill it.
A calm, ambient design that makes you want to drink a little more every time you look.
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◆ Features
◎ An ambient water surface that rises as you drink
◎ A background that shifts with the time of day — morning, day, evening, night
◎ One-tap quick add, plus custom amounts for anything else
◎ Estimate your daily goal from your body weight
◎ Reminders within the hours you choose, so you never forget
◎ Apple Health integration that logs your water intake
◎ Monthly heatmap and weekly chart to review your habits (Pro)
◎ Log a glass in seconds from Apple Watch
◎ Home Screen and Lock Screen widgets show your progress
◎ Interactive logging from widgets and a Lock Screen Live Activity (Pro)
◎ Works in ml or fl oz
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◆ Perfect For
・Anyone building a habit of drinking more water
・People who want to stay hydrated without chasing numbers
・Apple Health users who want their water data in one place
・Apple Watch owners who want to log a glass in seconds
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Don't count it. Fill it.
Mitasu turns daily hydration into a calm, beautiful habit.
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Mitasu Pro (subscription) unlocks your full history beyond 3 days, monthly heatmaps, streaks, averages, custom reminders, and editable quick-add presets. Eligible new subscribers can start with a free trial. Plans renew automatically until canceled in App Store settings at least 24 hours before renewal.
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Terms of Use (EULA):
https://rakko.app/mitasu-terms-and-conditions/
Privacy Policy:
https://rakko.app/mitasu-privacy-policy/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
For the hot season: a clearer way to set your daily goal.
■ Goals above 3 L are now a deliberate choice
The slider covers daily goals up to 3 L, and anything higher is set separately as a higher goal. Hot conditions, sustained activity, and guidance specific to you are explained alongside it, together with the published sources behind the numbers.
■ Bug fixes
- A quick add from a notification on Apple Watch could fail to reach your iPhone.
- Logging on Apple Watch could leave the daily total shown in your reminders out of date.
■ A redesigned Mitasu Pro screen
Widgets, the monthly heatmap, and the Live Activity are now shown as real previews, so you can see what Pro does before you decide.
We read every piece of feedback. Thanks for drinking along with us.
The developer, Rakko Inc., 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Rakko Inc.
- Size
- 18.1 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.4 or later.
- iPhone
Requires iOS 26.4 or later. - Mac
Requires macOS 26.4 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.4 or later. - Apple Watch
Requires watchOS 26.4 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Mitasu Pro Annual $29.99
- Mitasu Pro Weekly $2.99
- Copyright
- © 2026 Rakko Inc.