Privacy Policy ” Zero to One"
Effective Date: September 10, 2026
Last Updated: September 10, 2026
Developer / Data Controller: Mashghala
Contact Email: tycoongames59@gmail.com
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1. Introduction
Welcome to Zero to One ("the App", "we", "us", or "our"). This Privacy Policy explains how we collect, use, disclose, and safeguard your personal information when you use our Android mobile application. By using the App, you agree to the practices described in this Privacy Policy.
We are committed to protecting your privacy and complying with applicable data protection laws, including the Google Play Developer Policy, the Children's Online Privacy Protection Act (COPPA), and the General Data Protection Regulation (GDPR) where applicable.
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2. Information We Collect
2.1 Information Collected Automatically
When you use the App, the following data may be collected automatically:
| Data Type | Purpose | Collected By |
| ----------------------------------- | ------------------------------------------------------------ | -------------------- |
| App Instance UUID | A randomly generated, non-hardware-bound unique identifier stored locally on your device. Used solely to associate your session with our backend API for content personalization and ad frequency control. | App / Our Server |
| App Version | Sent with API requests to ensure you receive the correct content for your app version. | App / Our Server |
| Device Country / Locale | Used to determine whether ads should be displayed (ad-blocked countries receive a premium, ad-free experience). | App / Our Server |
| Reading Progress | Your current reading page and total pages read are stored locally on your device (SharedPreferences). They are never uploaded to our servers. | Device Only |
| Daily Reading Streak | The date you last read and your streak count are stored locally on your device. | Device Only |
| Bookmarks | Page bookmarks you create are stored in a local database (Room DB) on your device only. | Device Only |
| App Settings | Your preferences (Night Mode, Eye Protection, Pagination Mode, Auto-Scroll) are stored locally on your device. | Device Only |
| Crash Reports & Diagnostics | Anonymized crash reports and performance data. | Firebase Crashlytics |
| App Usage Analytics | Anonymized events such as screen views and feature usage. | Firebase Analytics |
| Push Notification Permission Status | Whether you granted or denied push notification permission. | OneSignal |
| Ad Interaction Data | Ad impressions, clicks, and related interaction data for monetization. | AdMob / AdOptimum |
| User Feedback & Rating | If you submit an in-app review, your star rating and text feedback are submitted to our server. | App / Our Server |
2.2 Information You Provide Voluntarily
- In-App Feedback: When you rate the app or submit feedback through the rating dialog, we collect your rating (1 to 5 stars) and optional feedback text.
- Imported Books: PDFs you choose to import are stored entirely on your device's internal storage. We do not upload, access, or transmit these files in any way.
2.3 Information We Do Not Collect
We want to be transparent. We do not collect:
- Your real name, email address, or any personally identifiable information
- Hardware identifiers such as IMEI, ANDROID_ID, or MAC address
- Your location (GPS or IP-based)
- Photos, contacts, or call logs
- Any data from children under 13 years of age
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3. How We Use Your Information
We use the collected data for the following purposes:
1. To provide and improve the App: We use usage analytics and crash reports to identify bugs and improve app stability and features.
2. To display and manage advertisements: Ad interaction data is used to serve relevant ads through our ad mediation partner.
3. To personalize your content experience: The App Instance UUID and device locale are used to fetch relevant books, authors, and categories from our backend.
4. To send push notifications: With your permission, we may send you notifications about new content, features, or updates through OneSignal.
5. To control ad frequency: We use your App Instance UUID and app settings from our server to determine the ad display threshold, preventing excessive ads.
6. To process your feedback: If you submit a review, your feedback is stored on our server to help us improve the app.
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4. Third-Party Services
Our App integrates with the following third-party services. Each of these services has its own Privacy Policy:
4.1 Firebase (Google LLC)
- Firebase Analytics: Collects anonymized usage events and screen views to help us understand how users interact with the app.
- Firebase Crashlytics: Collects anonymized crash reports and stack traces to help us fix bugs.
- Privacy Policy: https://firebase.google.com/support/privacy
- Data Opt-Out: You can disable data collection by going to your device settings → Google → Ads → Opt out of ads personalization.
4.2 OneSignal (OneSignal Inc.)
- Purpose: Used to deliver push notifications to users who have granted permission.
- Data Collected: Device push token, notification interaction events (open/dismiss).
- Privacy Policy: https://onesignal.com/privacy_policy
- Opt-Out: You can revoke notification permission at any time in your device Settings → Apps → Zero to One → Notifications.
4.3 AdMob / AdOptimum (Google LLC)
- Purpose: Used to display advertisements within the App (banner ads and interstitial ads).
- Data Collected: Ad interaction data, device advertising ID.
- Privacy Policy: https://policies.google.com/privacy
- Opt-Out: You can opt out of personalized advertising by going to your device settings → Google → Ads → Opt out of ads personalization.
4.4 AndroidPdfViewer
- Purpose: An open-source PDF rendering library. It runs entirely offline and locally on your device and does not collect or transmit any data.
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5. Data Retention
| Data | Location | Retention |
| ---------------------------------------------- | -------------------------- | --------------------------------------------------- |
| Reading progress, bookmarks, settings, streaks | Your device only | Until app is uninstalled or data is cleared |
| App Instance UUID | Your device + Our server | Until app is uninstalled |
| User feedback / ratings | Our server | As long as reasonably necessary for app improvement |
| Crash reports | Firebase servers | 90 days (Firebase default) |
| Analytics events | Firebase servers | 14 months (Firebase default) |
| Ad data | Google / AdOptimum servers | Per their respective policies |
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6. Data Sharing
We do not sell, trade, or rent your personal information to third parties. We may share limited, anonymized data in the following cases:
- With our backend API server: Your App Instance UUID, App Version, and Device Locale are sent to our server to fetch content and app configuration.
- With third-party SDKs: As described in Section 4, integrated SDKs (Firebase, OneSignal, AdMob) may receive data per their own privacy policies.
- For legal compliance: We may disclose your data if required by law, regulation, or a valid legal request.
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7. Storage and Device Permissions
The App may request the following permissions:
| Permission | Reason |
| --------------------------------------------- | ------------------------------------------------------------ |
| INTERNET | Required to fetch books, categories, and serve ads from our API and ad networks. |
| ACCESS_NETWORK_STATE | Used to check network availability before making API requests. |
| READ_EXTERNAL_STORAGE (Android 12 and below) | Required to allow you to select and import PDF files from your device storage. |
| WRITE_EXTERNAL_STORAGE (Android 12 and below) | Required to save screenshots of PDF pages to your device when using the Share Page feature. |
| POST_NOTIFICATIONS (Android 13 and above) | Required to send push notifications via OneSignal. This is always opt-in. |
All permissions are requested only when a related feature is used. You may deny any permission; however, some features may not be available without them.
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8. Data Security
We are committed to protecting your data. Measures we take include:
- All API communications are transmitted over HTTPS encrypted connections.
- Your reading progress, bookmarks, and personal settings are stored entirely on your device and never transmitted to our servers.
- The device identifier we use is a randomly generated UUID (not tied to any hardware identifier), which is Google's recommended privacy-safe approach.
- We do not store payment information or sensitive personal data.
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9. Children's Privacy
The App is a book reading application based on the book "Zero to One" by Peter Thiel, which is intended for general audiences age 13 and older. We do not knowingly collect personal information from children under the age of 13.
If you are a parent or guardian and believe your child under 13 has provided us with personal information, please contact us at tycoongames59@gmail.com and we will promptly delete such information.
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10. Your Rights
Depending on your location, you may have the following rights regarding your data:
- Right to Access: Request information about what data we hold about you.
- Right to Deletion: Request deletion of your data from our servers.
- Right to Opt-Out: Opt out of push notifications, personalized ads, or analytics at any time through device settings.
- Right to Portability: Request a copy of your data in a readable format.
To exercise any of these rights, please contact us at: tycoongames59@gmail.com
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11. Do Not Track (DNT)
The App does not respond to "Do Not Track" signals from web browsers, as this is not applicable to Android applications. However, you can manage ad personalization through your device's Google Ads settings.
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12. Changes to This Privacy Policy
We may update this Privacy Policy from time to time. When we make significant changes, we will:
- Update the "Last Updated" date at the top of this document.
- Notify you through an in-app notification or update release notes on the Google Play Store.
We encourage you to review this Privacy Policy periodically. Continued use of the App after any changes constitutes your acceptance of the new Privacy Policy.
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13. Contact Us
If you have any questions, concerns, or requests regarding this Privacy Policy or our data practices, please contact us:
- Developer: Mashghala
- Email: tycoongames59@gmail.com
- App:" Zero to One” available on Google Play Store