Differential ("we," "us," or "our") operates dxshuffle.com (the "Service"), a study tool that shuffles medical diagnoses for review and lets you challenge a friend to guess them. The Service is intended for study purposes only and is not a source of medical advice.
This Privacy Policy explains what information we collect when you use the Service, how we use it, and the choices available to you. By using the Service, you agree to the practices described here.
Information you provide. The Service doesn't require an account, sign-in, or any personal details. The "Challenge a Friend" button builds a short text summary of the current card directly in your browser and hands it to your device's native share sheet, or copies it to your clipboard if your browser doesn't support that. That text is generated locally and never passes through our servers — we don't see it, receive it, or store it.
Information collected automatically. The Service doesn't run any first-party analytics or tracking code of its own. That said, like any website, basic technical details — such as IP address, browser type, and request timestamps — are typically logged by whichever provider hosts these files, as a normal part of serving a web page. Name your hosting provider — e.g., GitHub Pages, Cloudflare Pages, Netlify, Vercel — and link to its privacy policy if you'd like to be specific here.
We use the limited information described above to:
We don't sell personal information for money. Because Google AdSense sets cookies for ad personalization, some state laws (like the CCPA) may still treat that as a "sale" or "share" of information with a third party — see Your Privacy Rights below for how to opt out of it.
We don't operate a database of user information, so there's little for us to hold on to directly. Standard hosting request logs are kept only as long as our hosting provider's own policy specifies. Link to your host's log retention policy if you know it. Cookies set by Google AdSense follow Google's own retention practices, detailed at the link in Cookies and Advertising.
Depending on where you live, you may have rights under laws like the EU/UK GDPR or the California Consumer Privacy Act (CCPA). These typically include the right to access, correct, or delete personal information we hold about you, and — because AdSense cookies can count as a "sale" or "share" of information under some state laws — the right to opt out of that specifically, using the Google and Digital Advertising Alliance links in Cookies and Advertising above. For anything else, or if you have a question, reach us at your contact email.
The Service is not directed to children under 13 (or under 16 in the EU/UK), and we do not knowingly collect personal information from children. If you believe a child has provided us with personal information, contact us and we'll remove it.
We take reasonable steps to protect the information we collect, but no method of storage or transmission over the internet is completely secure, and we can't guarantee absolute security.
Your information may be processed in your country or other countries where our hosting and advertising providers operate, which may have data protection laws different from those where you live.
We may update this policy from time to time. Changes will be posted here with a revised effective date. Continuing to use the Service after an update means you accept the revised policy.
Questions about this policy? Reach us at:
your contact email
your name or business name, if applicable
This policy reflects what's actually built into dxshuffle.com as of the date above: no accounts, no first-party tracking, and Google AdSense as the one third-party service. Fill in the highlighted placeholders, add a consent tool if you expect EEA/UK/Swiss visitors, and it's worth a quick legal review before publishing, since ad-related privacy obligations vary by where your users are.