Tide & Harbour Log
A private tide & harbour log in one HTML file on your machine: no account, no cloud, no server to talk to.
This is not a screenshot. It's the real tool, running right here: go on, put something in it.
Forged into a knife, this tool ages with use: the blades you reach for wear soft, entries you tend keep their bloom, and the years travel with the file through every reforge.
If you live near water, the tide is the one appointment that never reschedules for you. The Tide & Harbour Log is a plain daybook for the water's comings and goings — date, high water, low water, conditions, and a notes field for whatever the harbour was doing that morning. Over a season it becomes your own local almanac, written by the only observer who was actually standing there.
What it keeps
- Datedate
- High watershort text
- Low watershort text
- Conditionsshort text
- Notesnotes
Standing facts
- One HTML file. Opens in any modern browser, on any operating system.
- No account. No login, no sign-up, no e-mail wall.
- No cloud. Nothing leaves your browser: no server, no telemetry, no analytics.
- Yours forever. The file keeps working whether or not Offline.Ltd does.
- Ages with use. Entries you tend keep their bloom; the years travel with the file through every reforge.
In ten years
Whatever you put in (Date, High water, Low water and Conditions) stays inside the file itself. There is no account to lapse, no plan to be sunset, no migration e-mail with a deadline in it. A decade of tide & harbour log entries is a decade of your own handwriting, kept in a document you can back up like any other.
If Offline.Ltd closes tomorrow, nothing on your machine notices. That isn't a marketing promise; it's simply what a file is.
Getting your data out
Export to CSV from inside the tool and open it in anything: a spreadsheet, another app, a text editor. Or keep the HTML file: it is plain, readable, and inspectable; you can open it in a text editor and see your own rows sitting there. No export queue, no "we'll e-mail you a link within 48 hours", no format that only one vendor can read.
Copy the file to a USB stick, a NAS, a folder your devices already sync. It runs on Windows, macOS, Linux, Android and iOS, online or off, because a browser is the only thing it ever needed.
Who else sees this
Nobody. Your Date, High water, Low water and Conditions never leave the file on your own disk. There is no account, no telemetry, no analytics, and no code in the file that opens a network connection, pull the cable and watch it carry on working. How privacy works across the Homestead tools →
Questions people ask
Does a tide log app need an internet connection or GPS?
This one needs neither. It is a single HTML file that runs entirely in your browser, offline, and nothing you write in it ever leaves the page. You could fill it in from a boat with no signal, which is rather the point.
How do I record tides in the Tide & Harbour Log?
You add an entry with the date, the high and low water as you observed or read them, the conditions, and any notes. It keeps the list; the noticing is your job.
Who is a tide and harbour log for?
Anyone with a reason to care what the water did today — sailors, sea swimmers, beachcombers, people with a mooring, people with a bench and a view. If you check the tide more than the weather, it is for you.
Go deeper on Tide & Harbour Log
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Fits your knife at weight 1. Nothing here is final, Knife follows Life. Reforging within your tier is free, forever. Add it, drop it, reforge it later; the file stays yours either way.