Last updated: September 2026.

The short version: the data this site cares about — your cartridge prices, your volumes — never leaves your browser. Here’s the longer version, organized by who can see what.

What’s computed on your device (everything that matters)

The calculator is a single JavaScript file. When you type a cartridge price or a page count, the file in your tab does the arithmetic and updates the numbers on screen. There is no “calculate” button pointing at a server, no background sync, no telemetry beaconing your inputs home. Open your browser’s network inspector while you use it: after the page’s own files load, the connection goes quiet. Pull the network cable and it keeps working — the math has no server side to lose.

What Cloudflare sees (infrastructure, unavoidable)

Pages are served from Cloudflare’s edge network, so Cloudflare’s logs necessarily contain the usual transport metadata — your IP address, the requested URL, timestamps, user-agent — needed to deliver pages and filter abuse. On our side there’s no application database, no user table, nothing for that metadata to be joined to. It’s plumbing, not profiling.

What the ad network sees (only if an ad fills)

The site may carry Google AdSense units. When an ad renders, Google’s scripts can set their own cookies and collect their standard measurement data — that’s a direct browser-to-Google relationship. Your calculator inputs are never included: they were never transmitted in the first place, so there’s nothing for the ad request to leak. If you’d rather skip it, an ad blocker or Google’s ad personalization controls both work, and every page on the site functions identically with ads blocked.

What nobody sees (the calculator state)

• No first-party cookies. The site sets none.
• No storage APIs. Nothing goes in localStorage, sessionStorage or IndexedDB — close the tab and the session is gone entirely.
• No accounts. No sign-in, no email gate, no “save your calculation” feature that would require knowing who you are.
• No analytics. We don’t run a first-party tracker; the only third-party script is the ad loader described above.

Questions & changes

Privacy questions go to hello@nxtolerance.com. If this policy changes, the new version replaces this page under a fresh date.