Privacy Policy
This policy applies to all iOS apps released by Masaki Hayashi.
This Privacy Policy (“Policy”) applies to all iOS apps published or distributed by Masaki Hayashi, including related iPadOS/watchOS apps, websites, and support channels.
Effective date: 2023-11-14
Last updated: 2026-02-17
1. Scope
This Policy describes how information is handled in apps provided by Masaki Hayashi. If a specific app has additional rules, they are described in the App Store listing or in-app notice.
2. Information Collected
Information may be collected to provide and improve app functionality and support operations.
2-1. Automatically Collected Information
- Usage data (screen transitions, feature usage counts, operation events)
- Device data (OS version, device type, app version, language, time zone)
- Identifiers (e.g., advertising identifiers, depending on OS settings)
- Error data (crash logs, error logs)
2-2. Information Provided by Users
- Information entered when contacting support (email address, inquiry content)
- Information explicitly entered and saved by the user within the app
3. Purpose of Use
Collected information is used for:
- Providing and maintaining app functions
- Quality improvement, usage analysis, and UI/UX improvement
- Bug investigation, incident response, and support response
- Fraud prevention and security
- Ad delivery (only in apps that include ads)
4. External Transmission and Third-Party Services
Depending on the app, third-party services may be used:
| Provider / Service | Primary Purpose | Data That May Be Sent |
|---|---|---|
| Google Firebase Analytics | Usage analytics | Device info, event info, usage statistics |
| Google Firebase Crashlytics | Crash analysis | Crash logs, device/OS info |
| Google AdMob | Ad delivery | Advertising identifier, device info, ad response info |
Please review each provider’s privacy policy for details:
- Google Privacy Policy: https://policies.google.com/privacy?hl=en
- Google Ads Policy: https://policies.google.com/technologies/ads?hl=en
5. Third-Party Disclosure
Personal information is not provided to third parties without user consent, except as required by law. However, information may be sent to third-party service providers to the extent necessary for the purposes listed above.
6. Data Management and Retention
- Data is retained only for the period necessary to achieve the stated purposes.
- Data that exceeds the retention period is deleted or anonymized by reasonable methods.
- Appropriate security measures, including access control, are implemented.
7. User Choices and Rights
Users can:
- Restrict ad identifier usage in device settings
- Stop data transmission by uninstalling the app
- Request consultation regarding disclosure, correction, or deletion via support contact
Requests may not always be fulfilled depending on legal requirements and identity verification results.
8. Use by Minors
If a minor uses the app, parental or guardian consent should be obtained.
9. Revisions
This Policy may be revised due to legal updates or service changes. Revisions take effect when posted on this page.
10. Contact
For inquiries about this Policy, please contact:
- Operator: Masaki Hayashi
- Contact email: [email protected]