Privacy Policy

1. Information We Collect

We collect the following information:

• Account information: email, name, profile image (collected through Clerk at sign-up)
• Service usage data: the books you add to your library, reading logs (quotes, thoughts, action notes), book reviews, reading progress and statistics, reading timer sessions (start time, duration, page range, and time zone when finished), settings such as interests and yearly goals, ebook subscription availability reports (book, service, time), and system logs
• Payment information: payment method identifier, subscription status, and billing history are processed by Polar; sensitive data such as card numbers is not stored on our servers.
• Automatically collected: IP address, browser/device information, access time, page usage, cookies

2. How We Use Information

Collected information is used only for the following purposes:

• Account authentication and management
• Providing service features such as library management, reading logs, book review writing (including AI draft generation), and reading statistics
• Processing payments and refunds for paid plans
• Sending service notices, customer support replies, and policy updates
• Preventing abuse and maintaining service stability
• Improving the service and analyzing usage statistics

3. Sub-processors and Third Parties

We rely on the following providers to operate the Service. Each processes personal data only within the scope of their assigned task:

• Clerk — authentication and account management
• Convex — database and backend
• OpenAI — AI book review draft generation (when you use the AI review feature, the book's details and your reading logs for that book are transmitted to OpenAI; nothing is transmitted if you don't use it)
• Vercel — hosting and access analytics
• Book search APIs (Kakao Daum Book Search, Open Library, National Library of Korea ISBN bibliographic data) — searching books and retrieving metadata (search terms and ISBNs are sent; account details such as your email or name are not sent with them. Whatever you type into the search box is sent as the search term)
• Polar — payment and subscription processing
• Sentry - error tracking and incident analysis (browser and device information, error details, and a screen-activity recording for a portion of sessions are sent when errors occur)

Except as required by law, we do not share your personal data with other third parties without your consent.

4. Retention Period

We delete collected personal data without undue delay upon account deletion. Where applicable laws (e.g., e-commerce, electronic financial transactions, communications secrecy) require retention for a specified period, we retain only the required data for that period and then delete it.

5. AI Feature Processing

Only when you use AI book review draft generation, the details of the selected book (title, authors) and your reading logs for that book (quotes, thoughts) are transmitted to the OpenAI API for processing. If you don't use the feature, your data is not transmitted to OpenAI or any other external AI service. OpenAI states that data received via its API is not used to train its models; however, we recommend that you do not put sensitive personal data in your logs. You retain ownership of the generated drafts and your reviews, and we do not use them for any purpose other than providing the Service.

6. Your Rights

You may exercise the following rights at any time:

• Request access, correction, deletion, or restriction of processing
• Close your account (see Section 7 for the procedure)
• Withdraw consent

You can exercise these rights through the in-app settings page or by contacting us at the address below. We will respond without undue delay.

7. Account and Data Deletion

You may request deletion of your account and associated data at any time. The procedure is as follows:

• Delete in the app: go to Settings → Data → Delete account. Deletion is processed immediately. If a paid subscription is still active, you can delete your account after it ends.
• Email request: send an email to hello@booklog.xyz from the address you signed up with, with the subject "Account deletion request". After identity verification, your account and data are deleted within 30 days.
• Scope of deletion: account profile (email/name/profile image), all books you have added, reading logs (quotes, thoughts, action notes), book reviews, reading statistics and settings, and logs.
• Deleted data cannot be recovered, so please back up anything you need before submitting a deletion request.

Information that we are legally required to retain (e.g., billing records and access logs under e-commerce / electronic financial transactions / communications secrecy laws) is kept only for the required period and then deleted. We notify you by email once deletion is complete.

8. Security Measures

We apply reasonable technical and organizational measures to protect personal data, including encryption in transit (HTTPS), access controls, and separation of administrator accounts.

9. Cookies and Analytics

We use cookies to keep you signed in and to analyze service usage. You can disable cookies in your browser settings, but some features may become unavailable. Access analytics is powered by Vercel Analytics and an analytics tool we operate ourselves. It stores a randomly generated visitor identifier in your browser storage (localStorage) and collects the pages you visit (with identifying parts of the address masked), how you arrived (the previous site's domain such as a search engine or social network) and campaign tags, your country, and your device type. If you are signed in, it also records whether and when you signed up, used key features, and made your first payment (payment amounts are not recorded). We do not store your IP address, and when you are signed in the data is linked to your account only through an irreversible derived value, never your email or name. Raw records are deleted after 90 days, and daily visit and activity records and visitor/account linkage data (the random identifier, first referral source, first landing page, country, and device) are deleted 400 days after your last visit, and records linked to your account are deleted when you delete your account (only the record that the deletion request was delivered to the analytics tool is kept for 7 days after delivery). If you block site data (browser storage) in your browser settings, the analytics tool collects nothing. Clearing storage starts you over as a new visitor.

10. Changes to This Policy

We will notify you in advance through the Service or by email if we make material changes to this policy. Changes take effect from the effective date stated in the notice.

11. Contact

For privacy inquiries or to exercise your rights, please contact us:

hello@booklog.xyz