Privacy Policy

1. Answers and results

Your 100 answers, progress, and generated result are stored in localStorage in this browser on this device and processed in the browser. The answer content and result are not sent to or stored on the operator’s server. No login or name is required.

2. Browser storage

localStorage stores your answers and the preview-feature expiry. sessionStorage stores visit, start, chapter, timing, and completion markers for the current browsing session. The public-site code does not set cookies. The browser or hosting infrastructure may use cookies or similar technologies for security or related functions.

Answers may remain after you close the browser. Delete the browser’s site data or use “Delete saved data” in the footer. Deleted data cannot be restored.

3. First-party usage statistics

We collect daily aggregate counts to improve the service. They are not linked to answer content. We currently do not use Google Analytics, Sentry, or advertising trackers.

• Visits, starts, chapter reaches, completions, completion-time ranges, and back actions
• Result copy/save/share actions, information-page views, preview-code outcomes, AI-export copy/download actions, and script-error occurrences
• Broad referrer category: direct, search, social, or other. The referring URL itself is not stored

4. Hosting infrastructure and access logs

This service is hosted with OpenAI’s ChatGPT Sites and uses its delivery and database infrastructure (Cloudflare Workers and D1). These providers may process ordinary access-log data such as IP address, access time, user agent, and request information to deliver and secure the site or investigate failures. We do not link this information to answers in our analytics database. No payment service is currently used.

5. Data sent to other services

When checking a preview code, only the entered code is sent to our server for verification and is not stored.

Only when you choose an X or LINE share button is a result summary and the page URL passed to that service. The 100 answers are not shared.

AI export is never sent to an AI service automatically. You copy it and choose whether to paste it into an external AI service. Processing after submission is governed by that service’s terms and privacy policy. RINKAKU is not officially affiliated with, and does not endorse, any particular AI service.

6. Purposes and retention

Aggregate statistics are used to understand usage, improve drop-off points, evaluate features, and detect failures. Daily aggregates are automatically deleted after 90 days. Answers stored on your device may remain until you delete them. Provider access logs follow each provider’s retention policy.

7. Contact

Questions about privacy or data handling: rinkaku.contact@gmail.com