Free water tracker
Tap a glass. Watch it fill.
Set the goal you have chosen for today, then tap each time you drink. The bottle fills as you go, so one glance tells you where you are.
Tap a button each time you drink.
The goal is yours to set; 2,000 ml is only a starting example. This page keeps count while it is open and forgets when you close it.
How to use it
Open the page in the morning and leave the tab where you will see it. Each time you finish a drink, tap the button that matches. If your cup is an odd size, type the amount once and use Add. That is the whole method: the bottle is there so you never have to do the sum in your head.
Choosing a goal
There is no single right number. How much water a person needs shifts with body size, activity, heat, and how much comes from food and other drinks. As a reference point, the US National Academies set adequate total water intake at about 3.7 litres a day for men and 2.7 litres for women, and that total includes the water in food and in every other drink, not just glasses of water.
If a doctor has given you a fluid target or a limit, use theirs. This page counts toward whatever number you enter; it does not suggest one.
Common sizes
| Container | Millilitres | US fluid ounces |
|---|---|---|
| Small glass | 250 ml | about 8.5 fl oz |
| Can | 330 ml | about 11.2 fl oz |
| Standard bottle | 500 ml | 16.9 fl oz |
| Large reusable bottle | 750 ml | about 25.4 fl oz |
| One litre | 1,000 ml | about 33.8 fl oz |
Making it stick
- Tie it to things you already do. A glass when you wake, one with each meal, one when you sit down to work.
- Keep the container in sight. A bottle on the desk gets drunk; one in the bag does not.
- Log as you finish, not later. Reconstructing a day from memory at 9 pm is guesswork.
Want it on your iPhone, with a reminder?
Dropkin: Water Reminder is an iPhone app that shows the day's water as a vessel filling up. Its listing says water logging, saved vessels, reminders, Hydration Pace and 30-day history are free, and that reminders stay quiet when you are on pace.
Get Dropkin on the App StoreCore tracking is free; optional Pro adds visual styles, worlds and longer history. Check the App Store for current purchase details. General information, not medical advice.
Honest Little Apps publishes both Dropkin and this page. This is a separate browser tool and does not sync with the app. App details checked November 10, 2026.
On a computer? Open it on your iPhone
