Privacy

What we do not collect

We do not operate user accounts. We do not store doses, schedules, weights, injection logs, symptoms or any other health information. There is no database holding that data, so there is nothing to breach, subpoena, sell or lose.

Calculators run entirely in your browser. Values you enter are held in the page address so a result can be bookmarked or shared, and they may be kept in your browser's local storage for convenience. Both live on your own device. Neither is transmitted to us.

A shared calculator link contains the numbers it encodes. Anyone you send it to can read those values, in the same way that anyone you forward a document to can read the document. Do not share a link you would not share the contents of.

What we do collect

If you subscribe to email updates, we store the address you give us with our email provider, Klaviyo, and use it only to send what you subscribed to. Every message carries an unsubscribe link, and unsubscribing removes the address. We do not sell or rent it.

We use privacy-respecting traffic analytics to count page views and referrers in aggregate. That data is not tied to an identity and is not used to build a profile of you.

Affiliate links

Some outbound links to suppliers and services are affiliate links, which means we may be paid a commission if you buy something. Those links are disclosed on the pages that carry them. Following one takes you to a third party whose own privacy policy applies from that point.

Your rights

Because we hold no health data and no account, most data requests have nothing to act on. For the email address we do hold, you can ask us to confirm it, correct it or delete it at any time by contacting us or by using the unsubscribe link.

Changes

If this policy changes in a way that affects what we collect, the change and its date will be published here.