Hydration Reminder Timer
Set an interval and let this browser water alarm nudge you to drink, while it counts your glasses for the day.
Reminders are off.
glasses of water today
Runs entirely in your browser. Your interval and glass count stay on this device and nothing is uploaded.
How to use this tool
Pick how often you want to be reminded and the number of glasses you are aiming for today, then press Start reminders. The page keeps a timer running and shows a gentle on-page message each time your interval passes. Every time you actually drink, tap I drank a glass so the counter moves toward your goal. If you want a desktop alert as well, tick the notification box before starting and allow the prompt your browser shows. Press Stop to pause the alarm, or Reset today to set the count back to zero for a fresh day.
How the reminder timer works
This water drink tracker uses a single repeating browser timer. When you start it, the tool schedules a tick using the interval you chose, and on each tick it reveals the on-page reminder. Your glass count and chosen settings are saved with localStorage and tagged with today's date, so reopening the page on the same day keeps your progress, while a new day starts clean. The optional desktop alert uses the browser Notification API and only fires after you grant permission. There is no account and no server, so this drink reminder works even with your connection off.
A real example
Say you are awake from 8:00 AM to 10:00 PM, a 14-hour window, and your goal is 8 glasses. If you set the interval to 90 minutes, the timer will nudge you roughly every hour and a half, which spreads about 9 reminders across the day, comfortably covering your 8-glass target. After your morning coffee you tap "I drank a glass" and the counter reads 1 / 8; by mid-afternoon it might show 5 / 8, telling you at a glance that three more glasses will hit your goal before the evening.
Common questions
Do the reminders keep running if I close the tab?
No. This is a fully client-side browser water alarm, so the timer only runs while the page is open. Keep the tab open (you can pin it) to stay reminded, and the desktop notification option helps it grab your attention when the tab is in the background.
Where is my glass count saved?
It is stored in your browser's localStorage on this device, tagged with the current date. Nothing is sent anywhere. Clearing your browser data or using private mode will reset the count.
Why did the desktop notification not appear?
Desktop alerts need permission. Tick the notification box before starting and click Allow on the browser prompt. If you blocked it earlier, re-enable notifications for this site in your browser settings. The on-page reminder always works regardless.
How many glasses of water should I drink a day?
A common rule of thumb is around eight 8-ounce glasses, but real needs vary with body size, climate, and activity. This hydration reminder tool on the web is for general wellness tracking only and is not medical advice; check with a healthcare professional about your own targets.
Can I change the interval after starting?
Yes. Press Stop, adjust the minutes, and press Start reminders again. The new interval takes effect right away and your glass count for the day is kept.