Drink more.
Weigh less.
Feel it.
Track your water and your weight in one calm app.
Waloo reminds you to drink at your own pace and never while you sleep. Log a glass in one tap, write a note on every weigh-in, and watch both lines move.
Get it on Google PlayFree. No account. Takes 30 seconds to set up.
- No account needed
- Works offline
- Data stays on your phone
- 10 languages
Tap the cup you actually drink from.
Pick your real containers once: the 250 ml mug, the 750 ml sports bottle, the 60 ml espresso. After that, logging is a single tap and Rio takes a sip with you.
- Every drink counts in full: water, tea, coffee, milk, juice.
- Forgot a glass at lunch? Log it for any time, edit or delete any entry.
- Ads never cover the log buttons.
Reminders that respect your sleep.
Set your wake and sleep time once. Waloo reminds you every 90 minutes in between by default, and you can change the interval whenever you like.
- Reminders stay quiet while you sleep.
- Just drank? Smart mode moves the next reminder instead of nagging.
- Log straight from the notification without opening the app.
A weight chart that remembers why.
Add a short note to any weigh-in, like "after holiday" or "started the gym". The note sits right on the chart, so the bumps make sense when you look back.
- Start, current and target, plus what is left to go.
- Set your own pace, up to 3 kg (6.6 lb) a week.
- A 7-day trend so one salty dinner does not ruin your week.
- kg, lb or stones, with decimals. Switch any time.
Every screen, straight from the app.
- Today
- Goal reached
- History
- Insights
- Weight
- Goal
Rio gets thirsty when you do. Rio never judges the scale.
Rio the fox lives on your home screen, reacts to how much you drank today, naps while you sleep and cheers when you reach your goal. Your weight never makes Rio sad.
Before you install
Do I need to create an account?
No. There is no sign-up, no email and no login. Open the app, answer a few questions about your day and you are logging your first glass.
Where is my data kept?
On your phone. Waloo has no server that stores your water or weight history. With Premium you can back it up to your own Google Drive and restore it on a new phone.
Does Waloo work offline?
Yes. Logging, reminders, your weight journey and Rio all work with no connection. Only buying Premium, Google Drive backup and ads need the internet.
How is my daily water goal worked out?
From a 2022 study in Science that measured how much water 5,604 people really use a day (Yamada et al.), based on your weight, activity, climate, age and sex. About 80% of that comes from drinks and the rest from food (EFSA 2010, National Academies 2004), so the goal is the drinks part, rounded to 100 ml and kept between 1.6 and 4 L. It is a suggestion: you can change it on the home screen or in settings whenever you like.
Does coffee or tea count?
Yes. Every drink you log counts in full toward your daily goal.
Will reminders wake me up at night?
Never. Reminders only run between the wake and sleep times you set, every 90 minutes by default.
What does Premium cost, and can I cancel?
In the US, Monthly is $0.99 with a 3-day free trial, Annual is $2.99 and Lifetime is a one-time $4.99. Prices vary by country, and Google Play shows yours before you pay. Subscriptions are managed in Google Play and you can cancel anytime there. Everything you logged stays yours either way.
Your first glass is one tap away.
Free on Google Play. No account. Set up in 30 seconds.
Get it on Google Play