Privacy Policy

Last updated: January 30, 2026

This Privacy Policy describes how Pinyin ("the App") handles your information. The App is designed to display Chinese text with pinyin annotations and is committed to protecting your privacy.

Information We Do Not Collect

The App does not collect, store, or transmit any of the following:

• Personal information (name, email address, phone number)
• Location data
• Contacts, photos, or other device data
• Text or documents you enter into the App
• Account credentials or passwords

Analytics

The App uses TelemetryDeck to collect anonymous usage analytics. TelemetryDeck does not collect any personally identifiable information. All data is aggregated and cannot be used to identify individual users.

The analytics data collected includes:

• App launch events
• Feature usage (e.g., which display modes or text sizes are used)
• Whether certain actions were taken (e.g., opening a document, using the share extension)
• Purchase events (product identifier only, no payment or billing information)

TelemetryDeck does not use device advertising identifiers and does not track users across apps or websites. For more information, see the TelemetryDeck Privacy Policy.

Documents and User Content

All text and documents you create or import are stored locally on your device. If you enable iCloud Drive in the App's settings, your documents are synced through Apple's iCloud service and are subject to Apple's Privacy Policy.

The App does not have access to your documents on any server. No user content is transmitted to us or any third party.

On-Device Processing

The share extension uses Apple's Vision framework to perform optical character recognition (OCR) on images. This processing happens entirely on your device. No images or recognized text are sent to any external service.

In-App Purchases

The App uses Apple's StoreKit for in-app purchases and subscriptions. All purchase transactions are handled by Apple and are subject to Apple's Privacy Policy. The App does not process or store any payment information.

Third-Party Services

The only third-party service used by the App is TelemetryDeck for anonymous analytics, as described above. No other third-party services, advertising networks, or tracking tools are integrated into the App.

Children's Privacy

The App does not knowingly collect any personal information from children. Since the App collects no personal information from any user, it is safe for use by all ages.

Changes to This Policy

If this Privacy Policy is updated, the revised policy will be posted at this URL with an updated date. Continued use of the App after changes constitutes acceptance of the revised policy.

Contact

If you have questions about this Privacy Policy, you can contact us by opening an issue at github.com/mikechin/Pinyin or by email at the address listed on the App Store.