Last updated 12 September 2026
Short version. There’s no account, no server and no analytics. What you type stays on your machine. I can’t see it, because there’s nowhere for it to go.
One exception, and only if you switch it on: the weather.
Your bills, their amounts and dates. Your income. Your spending estimates. Your reminders and appointments. The things you’ve told it will expire. Which look you picked and which tab you were on.
All of it lives in your browser’s own storage, on your device. If you have browser sync switched on, your browser copies it between your own signed-in installs exactly as it does your bookmarks. That transfer belongs to whoever makes your browser. It never comes near me.
Cached weather and half-finished setup answers stay local and are never synced.
Nothing, unless you turn on the weather.
If you do, the town you type goes to Open-Meteo to become coordinates, and those coordinates go back to fetch a forecast. That’s the whole of it. Open-Meteo say they set no cookies and store no personal data. Their forecasts are used under CC BY 4.0 and credited in the app.
Duesday asks you to type a town instead of reading your browser’s location, so it never knows where you actually are — only the middle of a town you named.
Switch the weather off and the location and the cached forecast are deleted.
Plain HTML on Cloudflare Pages. No cookies, no trackers, no analytics, and no webfonts — the typeface is one already on your machine, because a site arguing this should not open by fetching something from Google. Cloudflare keeps ordinary server logs, which I don’t read and couldn’t connect to anything you do inside the app anyway.
Manage data saves the lot to one file you keep, and restores from one. The same screen clears any section or all of it, weather location included. Remove the extension and everything your browser held for it goes with it.
Duesday isn’t aimed at children and collects nothing from anybody.
Any change gets published here with a new date. If Duesday ever starts collecting something — there’s no plan to — it will say so here before it happens, not after.