Privacy Policy
Shinobu Hayashi ("we") sets forth the following privacy policy regarding the handling of user information on the website "Plun" (plun.app, the "Service").
1. Information we collect
We collect the following information.
- Anonymous session ID: To identify your access rights to purchased content, we issue a random string as a cookie (kz_sid). It is not linked to your name, email, or any other personally identifying information.
- Quiz answers and results: Quiz answers and computed results are processed in your browser and, as a rule, are not sent to our servers.
- Purchase history: If you purchase paid content, we store the fact of the purchase, the amount, the currency, and the Stripe-issued session ID, linked to the anonymous session ID above.
- Access logs: On the Cloudflare infrastructure, request information such as IP address and User-Agent is temporarily logged.
2. Purposes of use
We use the information for the following purposes.
- Providing paid content and authenticating purchasers
- Preventing fraudulent use of the Service and improving operations
- Compliance with applicable law
3. Provision to third parties
We do not provide user information to third parties without prior consent, except that we entrust the handling of information to the following service providers to the extent necessary to provide the Service.
- Stripe, Inc. — payment processing. Credit-card data is handled directly on Stripe's systems and we do not store it.
- Cloudflare, Inc. — website delivery and database.
4. Use of cookies
We use the minimum necessary cookies to maintain purchasers' access rights. You may disable cookies in your browser settings, but you will lose access to content you have purchased.
5. Requests for disclosure, correction, or deletion
If you wish to request disclosure, correction, or deletion of your information, please contact the address below. We will respond promptly within a reasonable scope after verifying your identity. Because the information we hold is limited to the anonymous session ID and purchase history, we may ask you to provide information that allows us to identify the target (such as your Stripe receipt).
6. Contact
7. Changes to this policy
This policy may be revised due to changes in law or other circumstances. The revised policy takes effect when posted on this page.
Last updated: 2026-07-09