SHINNEN

SHINNEN ("the App") respects user privacy and handles only the minimum information necessary. This policy describes — plainly and openly — what information we collect, how we use it, and how it is stored.

Effective date: 2026-07-09

1. Information We Collect

• Anonymous user identifier (UID issued by Firebase Authentication) — used to link measurement history to THE PILGRIMAGE
• Optional nickname (up to 20 characters; no real name required)
• Optional country/region code (used only for flag display and country ranking)
• Measurement results (score, timestamp, mode)
• SHINNEN INDEX (cumulative count of measurements) and per-mode counts
• Language preference (Japanese / English)
• Device identifier (Android: ANDROID_ID / iOS: identifierForVendor) — an anonymous ID for fraud detection only. Not an advertising ID; used solely to distinguish devices.
• Advertising identifier (Android Advertising ID / iOS IDFA) — In the free Quick / Normal modes, Google AdMob serves non-personalized ads only. The advertising identifier is not used for ad personalization or for tracking you across apps or websites; Google may process it solely for frequency capping and fraud / invalid-traffic prevention. See Section 4a. Users who purchase Hard mode see no ads at all.

2. Information We Do NOT Collect

• Name, phone number, or email address (not collected in the current version)
• Precise location or GPS data
• Contacts, photos, camera, or microphone
• Accelerometer and gyroscope readings are used solely on-device as a source of randomness in "Hard mode" — never transmitted or stored on any server
• Browsing history outside the App, cross-app or cross-website tracking, or behavioral advertising profiles — the App serves non-personalized ads only (see Section 4a)
• Biometric or health-related information

3. Purpose of Use

• Displaying THE PILGRIMAGE (personal-best world rankings)
• Displaying THE DEVOTED (SHINNEN INDEX rankings)
• Storing and displaying PRACTICE CHRONICLE (personal measurement history)
• Commemorative card issuance and ownership verification (on-device)
• Debugging and quality improvement of the App

4. Data Storage and Third-Party Sharing

Measurement data and user information are stored on Firebase (Firestore and Authentication), a service provided by Google. Firebase is widely used worldwide and is protected by encrypted communication (HTTPS) and security rules. See Firebase Privacy Policy.

We do NOT sell or share user measurement results, nicknames, or device identifiers with third-party advertisers, analytics providers, or data brokers.

4a. Advertising (Google AdMob)

The App displays banner advertisements in the free Quick and Normal modes via Google AdMob. These are non-personalized ads: they are based only on contextual, non-personal signals — not on your interests, profile, or cross-app activity. Google may process your advertising identifier solely for frequency capping and fraud / invalid-traffic prevention — not for ad personalization and not for tracking you across apps or websites. See Google Ads Privacy Policy for how Google handles ad data.

Where ads are NOT shown — the "intention sanctuary":

• During intention phases (the moments when you direct your thought toward the randomness): waitShinen, shinen, switching, and shinenDown
• Across the entire App, for users who have purchased Hard mode (one-time purchase)

Ads may appear on: mode selection screen, baseline phases of Normal and Hard modes, result screens, PRACTICE CHRONICLE, THE PILGRIMAGE, THE DEVOTED, GALLERY, the measurement guide, and the about page — in the free modes.

Personalized ads & tracking: The App does not serve personalized ads and does not use App Tracking Transparency (ATT) or any cross-app tracking, so no tracking opt-out is necessary. Purchasing Hard mode removes all ads across the entire App.

5. Data Retention and Deletion

• Locally stored data (measurement logs, commemorative cards, etc.) is removed when the App is uninstalled
• Data on Firebase is retained until the user requests deletion
• To request deletion, contact us using the email below — provide your nickname or anonymous UID, and we will remove the associated data

6. About Sharing Features

Sharing a card to social media or other channels is initiated only by the user. The shared card image may include your nickname, country flag, and rank — but never email addresses or other personally identifying information.

7. Children

The App is not primarily directed at users under the age of 13. Children under 13 should use the App only with parental consent.

8. Your Rights

• Access your data (visible in PRACTICE CHRONICLE, THE PILGRIMAGE, and THE DEVOTED)
• Edit your nickname and country (via the profile-edit dialog)
• Request deletion of all your data (via the contact below)

9. Security

We protect data against unauthorized access through encrypted communication (HTTPS) and Firebase security rules. Please note, however, that no method of transmission or electronic storage can guarantee absolute security.

10. Changes to This Policy

This policy may be revised as needed. We will announce material changes within the App or on the app store listing. The effective date is shown at the top of this page.

11. Contact

For questions or requests regarding this policy or how data is handled, please reach us at:
shinnenofficialapp@gmail.com

— SHINNEN Development Team