An 8 fl oz glassA 300 ml glass
Enter 8300
Use a custom entry for exactly 8 oz. The 8.5 oz quick button adds a slightly larger amount.Use a custom entry for exactly 300 ml. The 250 ml quick button adds a smaller amount.
Hydration tracker for Android
Track your water in ounces or milliliters
Log a glass or bottle, see what remains toward your daily goal, and set reminders on Android. Choose US fluid ounces or milliliters. HydroFast is currently free, with no account required.
- Quick water logging
- oz and mL support
- Android reminders
What is HydroFast hydration tracking?
HydroFast records water intake against a daily goal and shows how much remains throughout the day. Quick entries keep regular logging practical on Android.
- Add water with preset quick buttons
- Enter custom water amounts
- Track daily goal completion
- View progress percentage and remaining water
- Review hydration history and trends
- Use Android reminders and notification actions
HydroFast works as a practical water intake tracker and daily water goal tracker for Android routines.
Glass and bottle examples
Log the amount you actually drank
Choose oz under Settings → Units, then open Water → + Custom. Enter your amount in Amount (oz) and tap Save Intake. These examples use US fluid ounces. New profiles start in ml; you can confirm it under Settings → Units. Open Water → + Custom, enter your amount in Amount (ml), and tap Save Intake. These examples use milliliters.
A full 20 fl oz bottleA full 600 ml bottle
Enter 20600
Log 20 oz after drinking the whole bottle. Refilling it does not itself add an intake entry.Log 600 ml after drinking the whole bottle. Refilling it does not itself add an intake entry.
Half of a 32 fl oz bottleHalf of a 1.5 liter bottle
Enter 16750
Half of 32 is 16. Record the amount consumed, rather than the bottle's full capacity.Half of 1,500 ml is 750 ml. Record the amount consumed, rather than the bottle's full capacity.
These are logging examples, not daily water-goal recommendations.
When a quick button is the right match
Finished a 500 mL bottle? Use the 16.9 oz quick button. The preset records 500 mL; its ounce label is rounded.Finished a 500 ml bottle? Use the 500 ml quick button. In ounces mode the same preset is labeled 16.9 oz.
- 3.4 oz100 mL100 mL3.4 oz
- 6.8 oz200 mL200 mL6.8 oz
- 8.5 oz250 mL250 mL8.5 oz
- 16.9 oz500 mL500 mL16.9 oz
These are the same four presets in either unit. Saved logs can be edited or deleted if you record the wrong amount.
Currently free. No account required. Core tracking works offline after installation.
Stay aware of your daily water goal
The day view answers three questions at a glance: how much you have logged, how much is left, and how close the goal is.
Daily water goal
Set a target and track progress during the day.
Remaining water
See how much water is left to reach the goal.
Progress percentage
Check the completed percentage quickly.
Progress ring
Visualize hydration progress with a simple ring.
Unsure where to start? Read how much water to drink a day for intake references and a practical way to choose your tracking goal.
Getting started
How to track water in ounces
HydroFast uses US fluid ounces, a measure of volume. One fl oz is about 29.57 mL. The app labels this unit oz.
Choose oz in Settings
Open Settings, find Units, and tap oz. You can switch back to ml later; your recorded intake stays the same.
Log the amount you drank
Open Water and tap + Custom. Type your amount in Amount (oz), then tap Save Intake. Use a preset instead when its amount matches what you drank.
Review your goal and reminders
Set your daily goal in the Water screen and configure hydration reminders around your schedule. The goal is your chosen tracking target, not a medical recommendation.
Hydration reminder app for Android
HydroFast includes Android hydration reminders to help users remember water intake during the day. Reminder settings can use intervals, custom time slots, and smart adaptive behavior based on progress.
- Interval reminders
- Custom reminder times
- Smart adaptive reminders
- Motivation reminders
- Android notifications
- Snooze support
HydroFast uses Android notifications for reminders. It does not need a remote push backend for daily hydration reminder scheduling.
Faster water logging on Android
Two shortcuts cover most logging: the button on a reminder notification, and the home screen widget.
Log water from notification
Use the notification action button to add water quickly.
Snooze reminder
Delay a hydration reminder when it is not the right time.
Home screen widget
Use widget quick actions to track water without opening the full app.
Review hydration history and trends
Daily history and progress views show when water was logged and how intake changes over time.
- Hydration trend chart
- Daily logs
- History timeline
- Today, Week, and Month insights
- Completion stats
- Streak support
More than a water tracker
Water intake, fasting sessions, reminders, history, streaks, and progress all live in the same app, so the two habits share one record instead of two.
Hydration screenshots
Hydration tracker FAQ
What is the HydroFast water tracker?
HydroFast is an Android water tracker for logging daily intake, setting a water goal, checking progress, and reviewing hydration history.
Can I track water in ounces instead of milliliters?
Yes. In HydroFast, open Settings, find Units, and choose oz. Water amounts use US fluid ounces, with 1 fl oz equal to about 29.57 mL. You can switch back to ml without changing the amount of water recorded in your history.
How do I log an 8 oz glass or a 20 oz bottle?
Choose oz under Settings > Units. Open Water, tap + Custom, enter 8 or 20 in Amount (oz), then tap Save Intake. Log only what you drank: half of a 32 US fl oz bottle is 16 oz. The 8.5 oz quick button records 250 mL, so use a custom entry for exactly 8 oz.
Is HydroFast free to use?
Yes. HydroFast is currently free to use on Android, with no purchase required for water tracking, fasting timers, reminders, or progress history.
Does HydroFast work offline?
Yes. Core water and fasting tracking works from data stored on your device, and reminders are scheduled locally. Downloading the app and sending a Help and Support request require internet access. There is no cloud sync or backup-and-restore feature.
Does HydroFast have quick water logging?
Yes. Four preset buttons cover 100 ml, 200 ml, 250 ml, and 500 ml; anything else goes in as a custom entry.
Can I edit or delete water logs?
Yes. Saved entries can be corrected or removed, so a mistyped amount does not stay in your history.
Does HydroFast have hydration reminders?
Yes. Choose a repeating interval or your own times, and reminders can adapt to how much you have already logged.
Can I log water from an Android notification?
Yes. A Log water button on the reminder records the amount without opening the app.
Does HydroFast have a water tracking widget?
Yes. The widget shows your hydration status and carries an add water shortcut.
Android app
Make daily water logging easier
Log a glass in one tap, follow a daily goal in ml or oz, and keep hydration reminders running on Android.