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Privacy Policy

Last updated: March 23, 2026

Zander Modaress-Razavi (“we”, “our”, or “us”) operates the Kiku: PDF Notes & Audio mobile application (the “App”). This Privacy Policy explains how we collect, use, and protect your information when you use our App.

Information We Collect

Analytics Data

We use PostHog, a third-party analytics service, to collect anonymous usage data including:

  • App launches and screen views
  • Feature interactions (taps, scrolls)
  • App lifecycle events

This data is collected using anonymous identifiers and cannot be used to identify you personally. We use this data solely to understand how users interact with the App and to improve the user experience.

Subscription Data

We use RevenueCat to manage in-app subscriptions. RevenueCat collects:

  • Anonymous user identifiers
  • Purchase and subscription status
  • Transaction history

This data is used to verify your subscription status, prevent fraud, and provide you with access to premium features. RevenueCat does not collect your name, email address, or any other personally identifiable information through our App.

Crash Data

We collect crash logs to identify and fix bugs. Crash data includes technical information about your device and the state of the App at the time of a crash. This data does not include personally identifiable information.

Network Data

Our App communicates with a Cloudflare Worker proxy server to provide AI text-to-speech and content filtering features. Your IP address is temporarily processed for rate limiting purposes and is not stored beyond the rate limiting window (typically 5 minutes).

Information We Do Not Collect

We do not collect:

  • Names, email addresses, or phone numbers
  • Location data
  • Photos, videos, or audio recordings
  • Contacts or address book data
  • Browsing or search history
  • Health or fitness data
  • Financial or payment information (payments are processed entirely by Apple)
  • Advertising identifiers

Your Documents

Your PDF documents, annotations, and notes are stored locally on your device and in your personal iCloud account. We do not have access to your documents. Text from your documents is sent to our proxy server solely for the purpose of generating text-to-speech audio and content filtering, and is not stored after processing.

Third-Party Services

Our App uses the following third-party services, each with their own privacy policies:

  • PostHog — Analytics
  • RevenueCat — Subscription management
  • Cloudflare — Proxy and rate limiting
  • Inworld AI — Text-to-speech generation
  • Apple iCloud — Document sync and storage

Data Retention

Anonymous analytics data is retained for up to 12 months. Subscription data is retained by RevenueCat for the duration of your subscription and as required by applicable law. We do not retain your document content after processing text-to-speech requests.

Children's Privacy

Our App is rated 4+ and does not knowingly collect personal information from children under 13. If you believe we have inadvertently collected such information, please contact us and we will promptly delete it.

Your Rights

You may:

  • Delete the App at any time, which removes all locally stored data
  • Manage your iCloud data through your Apple ID settings
  • Request deletion of your analytics data by contacting us

Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the “Last updated” date.

Contact Us

If you have questions about this Privacy Policy, please contact us at:

zandmanv8@gmail.com