Last updated: April 24, 2026
J! Study (jstudyapp.com) is a free, unofficial Jeopardy! study platform operated by an individual, not a company. This privacy policy explains what data we collect, why, and what you can do about it.
We try to collect as little as possible and we do not sell your data to anyone.
J! Study is operated by an individual based in the United States. Our server is hosted by Hetzner Online GmbH in Germany (European Union). For questions about this policy or your data, contact us at [email protected].
When you create an account, we collect:
If you sign in with Google, we receive your email address, name, and profile picture URL from Google. We use this only to create and identify your account. We do not access your Google contacts, calendar, files, or any other Google data.
Legal basis (GDPR): Contract performance — we need this information to provide you with an account and the service you signed up for.
When you use J! Study, we track:
This data powers your progress dashboard, recommendations, and spaced repetition scheduling. It is tied to your account and is not shared with anyone.
Legal basis (GDPR): Contract performance — tracking your progress is a core part of the study service.
We use PostHog (posthog.com) for product analytics to understand how people use J! Study so we can improve it. PostHog may collect:
You can opt out of analytics tracking at any time.
Legal basis (GDPR): Legitimate interest — understanding usage patterns to improve the service.
Our web server automatically logs IP addresses, pages requested, browser user-agent strings, and timestamps. These logs are used for security monitoring and debugging, retained for 30 days, and then deleted.
Legal basis (GDPR): Legitimate interest — keeping the service secure and diagnosing technical problems.
We use Resend (resend.com) to deliver emails. Resend processes your email address on our behalf; they do not use it for their own purposes.
We do not send advertising emails or share your email with anyone for marketing purposes.
We do not use advertising cookies or third-party tracking cookies.
We share data with the following services, and only as described:
We do not sell, rent, or trade your personal data to any third party.
Regardless of where you live, you can:
If you are in the European Union, you additionally have the right to restrict processing, object to processing, lodge a complaint with your local data protection authority, and data portability.
If you are in California: we do not sell your personal information and we do not share it for cross-context behavioral advertising.
To exercise any of these rights, email [email protected]. We will respond within 30 days.
We take reasonable measures to protect your data: passwords are hashed with bcrypt, the site is served over HTTPS, server access is restricted to SSH key authentication, and the server is hosted in a certified data center in Germany. No system is perfectly secure. If we discover a data breach affecting your personal data, we will notify you as required by law.
J! Study is not intended for children under the age of 13. We do not knowingly collect personal information from children under 13. If you are a parent or guardian and believe your child has provided us with personal information, please contact us and we will delete it.
If we make significant changes, we will notify you by email or by posting a notice on the site. The "Last updated" date at the top indicates when the policy was last revised.
For any questions about this privacy policy or your personal data: [email protected]