To use a water intake counter correctly, record only the cups you personally count, set your own optional whole-number daily target, undo the latest entry after an accidental tap, and verify the saved date, cup total, and target in the daily history before exporting. The Water Intake Counter is a personal cup tally: it does not prescribe an amount, calculate millilitres, import wearable data, or judge hydration. Its job is to make your entries consistent and show progress against a target you choose. Start with a short label if it helps you identify the tally, enter a target from 1 through 9,999 cups if you want the page to show a percentage and whether the target has been reached, and press Add a cup once for each cup you decide to record. If you leave the target blank, cup counting still works, but the page states that no personal progress target is available to display. Set the target before the first cup of the day when possible, because the first saved cup preserves that date's target for its history and CSV meaning. At the end of the day, compare the displayed total with your own count, confirm the local calendar date, and export a copy if you want a file outside the browser.
What Correct Use Means
Correct use starts by separating the amount you record from the target you compare it with. The counter only knows that you pressed a cup button. It has no vessel measurement, health profile, wearable feed, or recommended intake built in. The following values describe what the interface means so a progress percentage is not mistaken for medical guidance.
| Element | How the counter works | Correct-use check |
|---|---|---|
| Counting unit | One Add a cup press adds one cup. | Count each unit once and use a consistent rule. |
| Daily target | Optional; when used, it is a whole number from 1 through 9,999 cups. | Choose your own plan rather than treating it as a prescribed amount. |
| Progress display | Shows the exact cup count and a plain percentage against the chosen target. | Read it as progress against your personal target. |
| Target status | Shows whether the chosen target has been reached. | Do not interpret the status as a hydration assessment. |
| No target | Cup records continue, but the interface says no personal progress target is available to display. | Leaving it unset is valid if you only want a tally. |
| Date | Each saved cup belongs to the local calendar date reported by your device. | Confirm the date, particularly around midnight. |
Set Up and Run Your Daily Tally
Use this procedure each day to keep the count and its context consistent:
- Open the counter in the browser where you want to return to its local history. The record is associated with this site and device rather than an account.
- Enter a short label if you want help identifying the tally. The label is optional and does not change the cup unit.
- Choose a whole-number daily target from 1 through 9,999 cups, or leave it blank if you only want to count cups. When you intend to use a target, setting it before the day's first cup gives that date a clearly preserved comparison.
- Press Add a cup once whenever you decide to record one cup. The screen then shows today's cup total and, when a target is set, the exact number of cups, a percentage, and whether the target has been reached.
- If the most recent press was accidental, press Undo a cup to remove that latest cup from the total. Recheck the count before recording more cups.
- Open the daily history and confirm that the saved date, cup count, and target, when present, match what you intended to record.
- Export a PNG or CSV only if you want a file outside the browser. CSV provides a row for every saved nonzero day, while PNG provides a visual summary of the total and recent days.
Keep Every Cup Meaning the Same
First, decide what one cup means in your personal counting rule. The counter works in cup taps and does not convert them to millilitres, so it cannot distinguish between container sizes. Choose a serving unit and apply that same rule throughout the day. For example, if your rule counts one full cup from your usual container, record that once rather than counting separate sips as cups or expecting the total to represent a measured fluid volume.
Second, avoid duplicate entries. Count a cup once when you have decided to record it, and use Undo a cup for a mistaken latest press. The short label helps identify your personal tally, but it does not make the tool infer what you drank. The counter also does not reconcile entries with a wearable, health profile, or background service.
Verify the Date and Preserved Target
Daily history is the verification record for what was saved. It lists each date with its cup count and, when one was selected, the target retained for that day. Today's total starts at zero when the device enters a new local calendar day, while previous nonzero days remain in the history list. A cup saved late at night stays attached to that local date instead of being moved to another date by a UTC boundary.
The implementation uses Intl.DateTimeFormat to identify the device-local calendar day. Target handling follows a similar preservation rule: when the first cup for a date is saved, that date's target is remembered. Changing your preference later does not rewrite an earlier day's meaning in the history or CSV, and a day with saved cups retains the target used for that day's progress. For a detailed walkthrough of the saved rows, see How to View Your Water Intake Counter Results.
Correct the Latest Entry
If you record a cup by mistake, use Undo a cup before continuing. It corrects the most recent cup in the total, after which you can check the revised count, percentage, and target status. Because this is a manual cup tally, a mismatch should be checked against your counting rule, selected target, and saved date rather than explained as a hidden hydration calculation.
If the stored result still looks inconsistent after checking the latest entry, follow the focused troubleshooting process in Fix Wrong Results After Using a Water Intake Counter.
Choose the Export That Matches Your Check
| Format | What it contains | Best use |
|---|---|---|
| CSV | Date, Cups, Daily target cups, and Goal reached columns, with one row for each saved nonzero day. | Reviewing every saved day in a spreadsheet or checking the recorded target and reached status field by field. |
| PNG | A 1080 by 1350 image containing the total and recent day rows. It does not include a URL or your custom label. | Creating a compact visual summary when the label and complete row-by-day detail are not needed. |
Both formats are generated locally through the browser's Canvas and Blob APIs. There is no account, upload, server-side file conversion, or hidden analytics request associated with the counter or its export controls. CSV is the more detailed option because it includes every saved nonzero day, while PNG is intended as a visual snapshot of the total and recent rows.
Confirm Privacy and Durable Access
Your label, target, and cup record live in local browser storage on the current device, following the browser storage model described by WHATWG Web Storage. They do not synchronize to a phone, computer, or account, and the counter does not collect anything in the background. Clearing this site's browser data removes the stored records, so export a copy first if you want a separate file.
If local storage is unavailable, the current page remains usable and displays that it cannot preserve a durable history. That message is important: do not assume a day will still be available later merely because it appeared in the current page.
Run a Final Accuracy Check
- Confirm that today's total equals the number of cups you intentionally chose to record.
- Check that you pressed Add a cup once for each counted cup and used Undo a cup for an accidental latest press.
- Verify that any target came from your own plan and treat its percentage and reached status as progress indicators rather than health results.
- Review the history row for the correct device-local date and the target preserved for that saved day.
- Choose CSV for detailed verification or PNG for a visual summary, and remember that PNG omits the custom label.
- Export the record if you need it outside this browser, since stored history does not sync automatically.
Following these checks keeps the counter transparent and useful as a record of user-entered cups, while avoiding unsupported claims about how much anyone should drink.