Review and correct your water intake history in HydraTag
History is where you check that the record matches what you drank and fix it when it does not. Everything on this screen is calculated from the drinks saved on your phone.
Today's drinks
Today lists the three most recent drinks with their times. Tap View all to open History with today selected.
Choose a period
At the top of History, pick 7 days, 30 days or Year. The large number is your daily average for that period, counting days with no logs as zero. The chart shows one bar per day (or per month in the Year view, where bars are monthly daily averages) with a dashed line at your goal. Tap a bar to see that day's drinks below.
| Figure | How it is worked out |
|---|---|
| Daily average | Total logged in the period divided by the number of days, including days without logs. |
| Goal days | Days in the period whose logged total reached your current goal. Changing the goal changes past goal days too. |
| Total logged | Everything logged in the period, shown in litres when your unit is millilitres. |
| View daily totals | Expands a list of each day (or month) with its drink count and total. |
Remove a drink logged by mistake
- Select the day in the chart.
- In the list below, tap the cross beside the drink.
- Confirm Remove in the "Remove this drink?" dialog, or choose Keep drink.
Removal cannot be undone. If you removed the wrong one, log it again from Today; the new entry carries the current time.
Undo the last drink
Right after logging, Today and Log water show Undo. It removes that drink only. Once you have moved on, use History instead.
Forgot to log earlier?
The current version records each drink at the moment you save it and has no way to edit a drink's time. Log the forgotten amount now; your daily total will still be right even though the time is not. If the drink belongs to yesterday, there is no way to move it, so leave a note for yourself and move on. A single misplaced drink matters less than a habit of logging.
Clear today or delete everything
In Settings, under Your data, on your device: Clear today's drinks removes today's saved drinks; Delete all water history removes every drink and any pending sticker logs while keeping your preferences. Both ask for confirmation and cannot be undone. There is no export or backup in the current free app, so copy anything you need by hand first.
Reading your own numbers
Use History to spot patterns you can act on: a weekday that always falls short, or evenings where nothing is logged. Compare weeks against each other rather than against someone else's target, and change your goal in Settings if it is clearly wrong for you. The app shows what you logged; it does not assess your health. Ideas for acting on what you see are in building a daily routine.
HydraTag guide ยท Updated October 2, 2026