Download on Google Play

The water reminderthat rings likean alarm.

H2O works out how much water you need, reminds you at the right moments through your day, and shows your progress as water filling a silhouette of you. Everything stays on your phone.

Get it onGoogle PlayHow it works
Smart timing
Auto
Personal goal
1.2–4.5 L
On your device
100%
H2O welcome screen: a lock screen with a Water Reminder notification saying it's time to drink water.
Smart timingDrinkLogWatch it fillPrivate by design

Why H2O

Drinking enough water, made automatic.

Most water apps wait for you to remember them. H2O does the remembering for you.

  1. 01

    A goal that fits you

    Your weight, height, gender and workouts set your daily target. No one-size-fits-all eight glasses.

  2. 02

    Reminders that time themselves

    Alerts ring like an alarm, with vibration and a 28-second tone. Their timing adjusts automatically to your day.

  3. 03

    Progress you can see

    Each drink raises the water inside a silhouette of you, in the app and on your home screen.

  4. 04

    Private by design

    No account to create. Your profile, drinks and history stay on your device, and nowhere else.

Adjusts to your day
Autotiming
Daily goal range
1.2–4.5L
Alarm tone
28sec
Stored on your device
100%

How it works

Set up in under a minute.

Five quick steps. No account to create, and everything you enter stays on your device.

01Step 1 of 5

Tell it about you

Weight, height, gender and whether you work out. It takes about twenty seconds.

Weight72 kg

Height178 cm

Workout day+500 ml

Your goal3,150 ml

02Step 2 of 5

Set your day

Pick when you wake up and go to sleep. H2O times your reminders around it.

07:00 wake23:00 sleep

Timing adjusts automatically

03Step 3 of 5

See your goal

Your target is shown as glasses and bottles, so it's easy to picture.

3,150 ml ≈ 13 glasses or 6 bottles

04Step 4 of 5

Turn on reminders

H2O asks for notification permission once, and that's it.

Allow H2O to send you notifications?

Don't allowAllow
05Step 5 of 5

Add the widget

Optional. Put your progress on the home screen and log from there.

32%1,000 / 3,150 ml
+250 ml+500 ml
Done

You're all set.

Your first reminder is scheduled the moment setup ends. Drink, tap to log, and watch yourself fill up.

Get it onGoogle Play

Features

Two ways to track every sip.

You'll spend most of your time in two places: the app's Today screen and the widget on your home screen.

The H2O Today screen: a body silhouette at 0% of a 3,150 ml goal, with pace, drinks, left and streak, and +250 ml, +500 ml and More buttons.

The Today screen

Watch yourself fill up.

Every drink raises the water inside a silhouette of you. Your pace, drinks, streak and what's left sit right beside it, so one glance tells you how the day is going.

  • Log a glass (250 ml) or a bottle (500 ml) in one tap
  • Pick any other amount on a quick slider
  • The screen turns coral when you fall behind
The H2O home screen widget at 32%, 1,000 of 3,150 ml, with +250 ml and +500 ml buttons.

Home-screen widget

Log without opening the app.

The same gauge lives on your Android home screen, with +250 and +500 buttons right on it.

  • Touch and hold an empty spot on your home screen
  • Tap Widgets and find H2O
  • Drag it into place

FAQ

Questions, answered.

Short answers about how H2O works and what it does with your data.

What is H2O Water Reminder?

H2O is an Android app that reminds you to drink water. It sets a daily goal from your body, sends alarm-style reminders at the right moments through your day, and shows your progress as water filling a silhouette of you.

How much water should I drink a day?

It depends on your body and how active you are. H2O calculates a personal daily goal from your weight, height, gender and whether you work out, adds 500 ml on workout days, and keeps the goal between 1.2 and 4.5 litres. For medical advice, talk to a doctor.

How does H2O remind me to drink water?

Reminders ring like an alarm, with max-priority alerts, vibration and a tone of about 28 seconds, so they are hard to miss. You can use your own ringtone, and reminder timing adjusts automatically to your wake and sleep times.

How do I log a drink?

Tap Glass to add 250 ml or Bottle to add 500 ml. For any other amount, use the quick slider. You can also log from the home-screen widget without opening the app.

Does H2O have a home screen widget?

Yes. The widget shows your progress on your Android home screen and has +250 ml and +500 ml buttons. Touch and hold an empty spot on your home screen, tap Widgets, find H2O and drag it into place.

Do I need an account? Is my data private?

No account is needed. Your profile, drinks and history are stored on your device and stay there.

Which phones does H2O work on?

H2O is available for Android phones on Google Play.

Download the app

Your next glass is already scheduled.

Download H2O from Google Play. No account to create, and everything you log stays on your device.

Get it onGoogle Play