Privacy

The short answer

Cistercian asks for no account and sets no cookies. The website collects nothing. The apps send a few anonymous usage statistics, described below, which you can switch off. What you type here does not leave your device unless you choose to share it.

The website

The site sets no cookies and runs no analytics. The number, the colours and the finish you pick live in the address bar — that is what makes any numeral a shareable link — and they are never sent anywhere or stored.

The typefaces are served from this domain rather than from a font service, so opening a page contacts nobody but this site.

The preview image a shared link produces is drawn on request from the parameters already in that link. Nothing about the request is kept.

The site runs on Vercel, which keeps short-lived server logs — address, time, page requested — the way every web server does, to run the service and defend it from abuse. They are not read for anything else and are not tied to a person.

The apps (iOS and Android)

The apps send anonymous usage statistics: when the app is opened, which screens are visited, how long a session lasts (in four coarse ranges) and the interface language. They are tied to a random identifier generated on your device when the app first needs it, not to you: no name, email, advertising identifier, location or contact, and nothing that can single you out. The identifier is not shared with anyone and is not used to track you across apps or sites.

The statistics are used only to see how the app is used and to improve it. They are sent to a small service on Cloudflare and stored on a database in the EU (Frankfurt, Germany).

They are on by default and you can switch them off at any time with the "Anonymous usage statistics" switch on the About screen. Switching off stops all sending and deletes both the queue of unsent statistics and the identifier on your device; switching back on generates a new one.

Your colours, finish and canvas settings are kept on the device so they survive a relaunch. Deleting the app deletes them.

Saving a numeral to Photos asks for add-only permission, the narrowest one Apple offers: the app can add an image and cannot read anything already in your library.

Tapping a link on the About screen opens it in your browser, and from there you are on that site's terms rather than mine.

Children

The statistics above are anonymous and carry no personal information, from anyone, at any age.

Changes

If any of this stops being true, this page changes first and carries the date.

Last updated 11 October 2026.