Privacy Policy

This policy explains what happens to data when you use this site. The short version: there are no accounts, no logins, and nothing you type here is sent to me.

1. Data stored on your own device

The site saves a few things in your browser's localStorage, which lives on your computer and is never transmitted anywhere:

• Your item list and prices — so your edits and added items are still there next visit.
• Your language choice.
• Your light/dark theme preference.

You can erase all of it at any time by clearing site data in your browser settings. Nothing is lost that I hold a copy of, because I do not hold a copy.

2. No account, no personal data collected by me

This site has no registration, no newsletter, no comment section and no contact form. I do not ask for your name, email address, wallet address or any other personal detail. If you email me voluntarily, I hold that email in order to reply to it — nothing more, and I do not add you to any list.

3. Third parties that receive your IP address

Some features require your browser to contact other companies. When it does, those companies necessarily see your IP address and basic technical details, and their own privacy policies apply:

• Bitcoin price providers — CoinGecko, Coinbase, Kraken, Bitstamp and Blockchain.info. Your browser requests the current price directly from them.
• Unsplash — serves the photographs on the page from its image CDN.
• Google Fonts — serves the Inter typeface.
• Google AdSense — if and when advertising is enabled (see below).
• The hosting provider — keeps standard server logs, as all web hosts do.

Note that no information about what you calculated is sent to any of these parties. A price request asks "what is Bitcoin worth right now" and nothing else.

4. Advertising and cookies

This site may display advertising through Google AdSense. Where it does:

• Google and its partners may set cookies or use similar technologies to serve and measure ads, and in some cases to personalise them based on your previous browsing.
• You can control ad personalisation at Google My Ad Center, and opt out of personalised advertising at aboutads.info.
• For visitors in the EEA, UK and Switzerland, a consent banner is required before any non-essential cookies are set, and advertising will only be personalised if you consent.

5. Analytics

This site uses Cloudflare Web Analytics to count visits and see which pages are useful.

It was chosen deliberately because of how little it collects:

• No cookies are set and no identifier is stored on your device.
• No cross-site tracking and no advertising profile is built.
• Data is aggregated. I can see that a page was visited; I cannot see who visited it.
• Nothing is sold or shared with data brokers.

Because it is cookieless and builds no profile, this analytics does not require a consent banner under the GDPR. Note that this is separate from advertising: if and when AdSense is enabled, that does require consent, as described in section 4.

6. Children

This site is not directed at children under 13 and does not knowingly collect any data from them.

7. Your rights

If you are in the EU, EEA or UK, the GDPR gives you the right to access, correct, delete, restrict or object to the processing of your personal data, and to lodge a complaint with your national data protection authority. Because this site holds no personal data about you beyond any email you choose to send, most of these rights have very little to act upon — but requests are always welcome at info@satmeter.io.

Dutch visitors can contact the Autoriteit Persoonsgegevens.

8. Changes to this policy

If this policy changes materially, the "last updated" date at the top of this page changes with it. Continued use of the site after a change means you accept the revised policy.

9. Contact

The person responsible for this site and for any data described above is Johan Demmers, based in the Netherlands. Privacy questions can go to info@satmeter.io.