ThirstyBotPersonalised in 30 seconds
Enter your name, height, weight, body type and goal. The app works out your BMI and suggests a daily water goal and reminder schedule.
The AI water reminder that knows your body
ThirstyBot is a free water reminder app for Android. It calculates your daily water goal, reminds you at the right time, and answers your hydration questions. Setup takes about 30 seconds.
- Free
- 30-second setup
- English & Vietnamese
Get it onGoogle Play
iPhone version coming soon
Water reminder app features
ThirstyBot combines a personal water intake calculator, drink water reminders and an AI hydration coach in one app.
One-tap logging
Pick a glass, sports bottle, large bottle, takeaway coffee cup, strawberry milk… or enter a custom volume.
Smart reminders
Get reminded every X minutes within your active hours, or at fixed times. Sleep hours keep the app quiet at night.
Chat with the AI coach
Ask anything about hydration. The AI answers from your own drinking data, in the language you choose.
History & stats
Daily, weekly and monthly views with your average, highest day and goal streak.
A mascot with feelings
ThirstyBot gets happy or sad with your progress, and gives you a daily hydration mission.
Advice for your body type
Water and schedule suggestions that match your body profile.
Over-drinking warning
The app warns you when your intake for the day goes beyond a healthy level.
How ThirstyBot works
Three steps to drinking enough water every day.
Tell it about your body
Height, weight, body type and goal.
Get your goal & reminders
The app suggests a daily water goal and builds a reminder schedule.
Drink, log, ask the AI
Tap to log each drink and chat with the AI whenever you need advice.
An AI hydration coach
ThirstyBot's AI coach answers hydration questions based on your profile and what you have drunk. Replies are short, practical and written in English or Vietnamese, whichever you choose in the app.
The AI does not diagnose illness. For kidney disease, heart conditions, oedema, pregnancy or diuretics, it advises you to consult a healthcare professional.
Have I had enough water today?
How much extra should I drink after an evening workout?
Does coffee count towards my water intake?
Ask me anything about staying hydrated 💧
Screenshots
How much water should you drink a day?
There is no single number that fits everyone. Water needs depend on body weight, activity, climate and health. That is why ThirstyBot sets your goal from your own body profile instead of a fixed number.
For reference, health authorities give these adequate total water intakes per day (including water from food):
- European Food Safety Authority (EFSA): about 2.0 litres for women and 2.5 litres for men.
- U.S. National Academies (as cited by Mayo Clinic): about 2.7 litres for women and 3.7 litres for men.
Drinking too much water in a short time can dilute the sodium in your blood (hyponatremia), causing nausea and headaches, and can be dangerous in severe cases. That is why ThirstyBot warns you when your intake for the day is unusually high.
ThirstyBot does not replace medical advice. If you have a medical condition, ask your doctor how much water is right for you.
Sources: EFSA – Dietary Reference Values for water · Mayo Clinic – Water: How much should you drink every day? · Mayo Clinic – Hyponatremia
Frequently asked questions
What is ThirstyBot?
ThirstyBot is a water reminder app with an AI coach. It calculates how much water you need each day based on your body and reminds you to drink on time.
Is ThirstyBot free?
Yes. ThirstyBot is free and shows ads.
How does the app calculate my daily water goal?
It uses the height, weight, body type and goal you enter at the start. You can update them at any time in your profile.
Can I set my own reminder times?
Yes. Choose interval reminders (every X minutes within a time window) or specific times, and set sleep hours so the app stays quiet.
What can the AI coach do?
It answers hydration questions and gives advice based on what you have drunk, in the language you choose. It does not diagnose illness or replace a doctor.
Which languages does the app support?
English and Vietnamese.
Is there an iPhone app?
ThirstyBot is currently available on Android (Google Play). The iPhone version is coming soon.
Where is my data stored?
Your profile and drinking history are stored on your phone. When you use the chat, your question together with a summary of your profile and intake is sent to Google's Gemini AI model (via Firebase) to generate the reply. You can delete all your data in settings. See the privacy policy.
Is drinking too much water harmful?
It can be. ThirstyBot warns you when your intake for the day is unusually high. ThirstyBot does not replace medical advice.
Start drinking enough water today
Download ThirstyBot for free and set it up in 30 seconds.