Page Trail Privacy Policy

Effective date: April 5, 2026 · Last updated: April 5, 2026

Page Trail (“we,” “us,” or “our”) respects your privacy. This Privacy Policy explains how we collect, use, store, and protect information when you use the Page Trail mobile application (the “App”) on iOS and Android. Please read it carefully. By using the App, you acknowledge that you understand this Policy.

We encourage you to save or print this page for your records. For rules that govern use of the App, see our Terms of Service.

1. Information we collect

To provide reading logs, bookshelf management, progress tracking, optional ambient audio while reading, and related features, we may process the following types of information, depending on the features you enable:

• Device and app information: Such as device brand, model, OS version, app version, package name, and whether the device is physical—used to maintain compatibility, security, and troubleshooting.
• Pseudonymous identifiers: A device-side identifier (for example, a UUID) generated and stored locally to distinguish devices in requests, analytics, crash reporting, and abuse prevention. It is not directly linked to your real name unless you provide it separately.
• Content you provide: Such as book titles, reading progress, notes, and preferences (for example, reading goals or ambient sound preferences).
• Network-related data: When you use features that require the internet, we may include the above device and app information in requests to operate APIs and protect our services.
• Feedback you submit: If you send in-app feedback or suggestions, the text you enter (and optional contact details you choose to provide) may be transmitted to our services and, where we use product analytics, may be included in analytics events to help us understand issues—please avoid including sensitive personal data you do not wish to share.

The App may request notification permission if we offer push messaging; audio-related permissions and background modes are used so ambient or focus audio can play while you read, including from the system notification area where supported. If a future version requests other sensitive permissions (such as camera, photos, or microphone), we will explain the purpose before access and only use them with your consent. You can revoke permissions in your system settings, though some features may no longer work.

1a. Analytics, crash reporting, remote configuration, and push notifications

We use Google Firebase services, which process data according to Google’s terms and policies. Depending on how the App is configured, this may include:

• Firebase Analytics: Aggregated or event-based information about how the App is used (for example, onboarding steps, app launch timing, or similar product metrics). We may associate events with your pseudonymous device identifier.
• Firebase Crashlytics: Crash reports and diagnostic data (such as stack traces and device state) to help us fix defects. We may set the same pseudonymous identifier on crash reports.
• Firebase Cloud Messaging (FCM): If push notifications are enabled, Google processes data needed to deliver messages, which may include a device token and related metadata.
• Firebase Remote Config: Fetches feature flags or configuration values so we can adjust App behavior without forcing an immediate store update.

Google acts as a service provider or processor in these roles. For more detail, see Google’s documentation on Firebase and data processing and the Google Privacy Policy. Data may be processed on servers located in various countries, including outside your own.

2. How we use information

• To provide, maintain, and improve core App features (bookshelf, reading progress, settings, preferences, and optional audio or notification features);
• To measure product performance, understand onboarding and usage patterns, and improve stability through analytics and crash reporting;
• To protect the security of our services and prevent fraud or abuse;
• To comply with legal obligations and respond to lawful requests from regulators or courts;
• For other purposes you consent to, as described separately where applicable.

We will not use your personal information for purposes not described in this Policy without your consent or another lawful basis.

3. Local storage and permissions

To support offline or low-connectivity use, we store data on your device using a local database (for example, SQLite via the app’s data layer) and lightweight key-value storage. Cover images or other media you load from the network may be cached on your device. Such data generally remains on your device; we do not upload your full reading library to our servers without a legitimate purpose (such as providing a specific feature) or a legal requirement.

4. Sharing, transfer, and disclosure

We do not sell your personal information. We may share or disclose information only in these situations:

• With your explicit consent;
• Where required by law or by competent authorities;
• With affiliates or service providers who process data on our behalf under strict confidentiality obligations—including Google (Firebase) for the services described in section 1a, and, if you make in-app purchases, Apple and/or Google as necessary to process payments and subscriptions;
• In connection with a merger, acquisition, or similar transaction—we will require the successor to honor this Policy.

5. International transfers

Where we operate primarily in one country, personal information collected there may be stored in that region. If we need to transfer data across borders, we will take steps required by applicable law (such as safeguards, assessments, or contracts) and inform you where necessary.

6. Your rights

Depending on applicable law, you may have the right to access, correct, delete, or export your personal information, to restrict or object to certain processing, and to withdraw consent where processing is consent-based. You may exercise these rights through in-app tools or by contacting us. We will respond within a reasonable period after verifying your identity.

7. Children

If you are below the age at which you may lawfully consent to data processing in your region, please use the App only with a parent or guardian’s involvement and consent. We do not knowingly collect unnecessary personal information from children. If we learn that we have collected such information in error, we will delete or anonymize it promptly.

8. Security

We use reasonable technical and organizational measures to protect your information against unauthorized access, disclosure, alteration, or loss. No method of transmission or storage is completely secure; please also protect your device and account credentials.

9. Changes to this Policy

We may update this Policy from time to time. For material changes, we will notify you through the App (for example, in-app notice or banner). Continued use after the update constitutes acceptance unless applicable law requires a different process.

10. Contact us

If you have questions, concerns, or complaints about this Policy or our processing of your information, contact us at lupasec@163.com. We will reply within fifteen (15) business days or as required by applicable law.