Privacy Policy

Last updated: August 18, 2026

Overview

CaffCutoff is designed to work without user accounts, a backend, or a customer database. We do not ask for your name, address, date of birth, or medical records to use the calculator.

Calculator data

Drink choices, caffeine amounts, intake times, and bedtime are processed locally in your browser. When you open a result or return to edit its inputs, this information is encoded in the URL fragment after the# symbol. The calculator removes a valid edit fragment after restoring the inputs. Under normal browser navigation, URL fragments are not included in requests to our web server.

Anyone who receives a complete result URL may be able to read the data in that URL. CaffCutoff's built-in share action excludes the result fragment and exact drink times, but you should still avoid manually sharing a full result-page address if you consider the information private.

Hosting and technical logs

The site is hosted through Cloudflare. Like most hosting providers, Cloudflare may process standard technical information such as IP address, browser type, requested URL, timestamps, and security or performance logs. This processing is governed by Cloudflare's own policies and infrastructure practices.

Cookies, analytics, and advertising

CaffCutoff currently does not use account cookies, advertising cookies, or third-party analytics. If analytics or advertising is introduced, we will update this policy and add any consent controls required by applicable law before enabling those services.

External reference links

The Sources page links to independent public-health and food-data websites. If you follow one of those links, the destination receives a normal browser request and handles it under its own privacy policy. CaffCutoff does not control those external websites.

Children's privacy

CaffCutoff is not directed to children under 13, and we do not knowingly collect personal information from children.

Policy changes

We may update this policy when the product, hosting, analytics, or legal requirements change. The date at the top of this page identifies the current version.