Privacy

Who is responsible

The data controller for this website is Dan Stevens trading as Sparky Papers. Contact: [email protected]

This website

• This site sets no cookies of its own.
• It uses no analytics, advertising or tracking of any kind.
• It loads no third-party scripts or fonts: everything it needs, including the Lexend and IBM Plex Mono fonts, is served from this site.
• The max Z_s calculator runs entirely in your browser. Nothing you type into it is sent anywhere.
• Like any web server, the server that hosts this site may keep standard technical logs (such as IP address, page requested and time) to keep the site running and secure.

Cloudflare

This site is served through Cloudflare, which sits between your browser and the server. Cloudflare processes connection data, such as your IP address, to deliver the site and to protect it from attacks and abuse. If Cloudflare needs to check that a visitor is not automated traffic, it may set a strictly necessary security cookie (such as __cf_bm or cf_clearance). Cloudflare’s privacy policy explains how it handles this data.

Buying and the free sampler

When you select a buy or free sampler button you leave this site for Payhip, which handles the checkout, the payment and the download, and asks for your email address so it can send you the file. Payhip’s own privacy policy explains how it handles your details.

Questions

For any question about privacy, email [email protected].

Last updated 15 October 2026.