The Water Intake Counter is a private cup tally that does not recommend how much water you should drink. There is no preset amount, no body-weight formula, and no medical default hiding inside it. Instead, you enter a whole-number daily target in cups that matches your own plan, then press a single button every time you want to record a cup. The screen shows today's count, the target you chose, and a plain percentage of that target reached so far. If you skip entering a target, the counter still tallies cups and clearly notes that there is no personal progress target to display. This deliberate separation between recommendation and tally is the defining feature of the tool, and it shapes every behavior from input to export. A user who wants the app to push a number is asking the wrong tool, and a user who already has a number in mind can use the Water Intake Counter to track that number without retyping it, without repeating a calculation, and without trusting a server.
Why the Tool Does Not Give a Recommendation
Most hydration calculators either print a formula on the page or hide one behind a body-weight prompt. They decide for you that one amount fits most readers, then ask you to confirm. The Water Intake Counter takes the opposite approach. Its product description states plainly that it does not calculate a recommended amount, does not infer body needs, does not use a default medical target, and does not diagnose hydration. It is also explicitly not a wellness promise. The tool is, instead, a tally with one practical addition: a progress bar against a daily target that the reader sets for themselves.
The distinction is more than branding. A recommendation carries a duty of care, and a tally carries a duty of accuracy. By staying on the tally side of that line, the tool can be honest about what it knows and what it does not. If you arrive with a number from your own reading, your clinician, your coach, or yesterday's habit, the counter can show you that number faithfully. If you arrive without one, the counter simply records cups and clearly tells you that there is no personal progress target to display. Nothing is faked, defaulted, or padded with a confident-sounding range.
What the Counter Records Instead
Once you decide to use the tool, three user-entered things define each day. First, an optional short label, which the tool accepts if you want a name to sit alongside the count. Second, an optional whole-number daily target in cups, anywhere from 1 through 9,999. Third, the cups you tap in. Every press of Add a cup raises today's total by one, and the screen reports the running count, the target you chose, and the percentage of that target reached. None of these numbers come from the tool. They come from you, and they are stored on your device.
The target is treated as a personal label, not as a recommendation supplied by the maker. That phrasing matters because it prevents two common traps. If the tool silently overwrote old days when you raised your ambition, the history would lie with it. If the tool defaulted to a "right" amount, anyone reading an old entry would assume that number had a basis it never did. The product contract preserves the meaning of each saved day by remembering the target used for that day with its first saved cup, so later preference changes do not rewrite older history.
How to Use the Water Intake Counter
- Open the Water Intake Counter in your browser on the device you plan to keep using it on.
- Type a short label in the optional label field if you want a friendly name to show up with the count. Leave it blank if you prefer a plain tally.
- Enter a whole-number daily target in cups, from 1 through 9,999, that matches your own plan. If you do not want a progress display yet, leave the target blank and the counter will still record cups.
- Press Add a cup each time you want to record a finished cup. The running total, the target, and the percentage reached update on the same screen.
- Press Undo a cup if a tap was accidental. Only the most recent cup is removed, so a single undo corrects one mistake rather than a streak.
- Scroll the daily history list to review each saved date, the cup count for that date, and the target kept with that day.
- Choose Export PNG or Export CSV when you want a file outside the browser. Both are generated locally and never uploaded to a service.
Local Dates, Saved Targets, and the Undo Button
Each saved cup is attached to the local calendar date your device reports. The tool derives that date from the device's own time zone through the Intl.DateTimeFormat facility, which means a cup you record at 11:50 p.m. stays on the day you drank it, not on the day a UTC clock happens to start. When a new local day begins, today's cup total resets to zero, and the previous day moves into the history list with its own count and its own target. The list therefore reads as a real calendar of days rather than as a single rolling total.
The first cup you save on any given date also saves the target for that date. From then on, changing your preference later does not change how that day appears in the history list or in a CSV export. The product contract calls this out explicitly: a day's target is remembered when its first cup is saved, which prevents an old day from appearing to have met a target you only chose afterward. If you want to know how this behaves in detail across preference changes, the guide on changing your target later in a Water Intake Counter walks through the same behavior with example dates. The Undo button keeps the same idea of integrity. It only retracts the latest cup, so a deliberate record cannot be silently shortened by a single mistaken tap.
Export Options at a Glance
The counter produces two file formats, both generated locally from browser canvas and Blob APIs without sending anything to a server. PNG and CSV are useful in different ways, and the table below compares them using the exact behavior described in the product contract.
| Feature | Export PNG | Export CSV |
|---|---|---|
| File dimensions or type | 1080 by 1350 image | Comma-separated values file |
| What it contains | Total and recent day rows | One row per saved nonzero day |
| Columns or fields | Image-only | Date, Cups, Daily target cups, Goal reached |
| Includes the custom label | No | No |
| Includes a URL | No | No |
| Opens cleanly in a spreadsheet | Not designed for that | Yes |
| Personal context carried | Lower (no label, no URL) | Lower but structured by date |
If you want a quick visual summary that you can paste into a message or drop into a notebook, PNG is the right shape. If you want to keep an analyzable record that opens in a spreadsheet and lets you sort, sum, or chart by date, CSV is the right shape. Both leave the source data on your device, so deleting the file does not delete the count.
Where Your Numbers Live
The counter uses the browser's local storage facility, specifically a bounded JSON record under the key counter:water-intake-counter. That key is scoped to this site's origin on the device you are using, which the WHATWG HTML Web Storage specification describes as the basic privacy boundary for web storage. Your label, target, and cup history live in that local record, and nothing is sent to a server, synced to a phone or computer, or attached to an account.
There is no account, no upload, no server-side file conversion, and no hidden analytics request on the export controls. If local storage is unavailable on the device or has been disabled, the page remains usable for the current session and displays a notice that it cannot preserve a durable history. Clearing this site's browser data removes the record completely, which is the same way a private paper tally disappears when you tear out the page. If you want a backup that survives clearing your browser, the CSV export is the closest the tool gets to one.
When a Self-Selected Target Is the Right Shape
The reason the tool refuses to recommend is also the reason it remains useful across very different readers. A person adjusting to a new training plan, a person recovering from an illness, a person tracking intake during a heat wave, and a person who simply wants to drink more on weekdays than weekends can all open the same page and start a tally that fits their situation. They enter a number that reflects their own context, and the counter reports progress in plain terms without dressing up that number as universal.
If you ever want a neutral count with no daily target at all, the Online Tally Counter keeps an adjustable-step counter without a target comparison. If you want a named habit with a calendar streak instead of a cup total, the Daily Habit Counter organizes the same idea around preset habit labels. For a reader whose question is specifically whether the Water Intake Counter will tell them how much to drink, the short answer has been on screen since the first sentence: it will not, and that is the point.