Privacy Policy

Last Updated: October 12, 2026

The Chi-tan Memo Development Team (hereinafter referred to as "Developer") respects the privacy of users (hereinafter referred to as "Users") who use "Chi-tan Memo" (hereinafter referred to as "the App") and is committed to protecting personal information. This Privacy Policy explains how information is handled in the App.

1. Information We Collect

1.1 User-Generated Information

The App stores the following information only on the user's device:

• Memo titles
• Memo content
• Memo creation date and time
• Memo update date and time

1.2 Storage Access

The App accesses the device's storage to read and save backup files (CSV format).

This access is used only to read and write files explicitly selected by the user, and no other files are accessed.

1.3 Advertising-Related Information

The App uses Google AdMob to display banner advertisements. AdMob may collect the following information:

• Advertising ID
• IP address
• Device information (model, OS version, etc.)
• Ad display and click information
• Approximate location

This information is used to display appropriate ads to users and measure ad effectiveness. For more details, please refer to Google's Privacy Policy.

1.4 Analytics Information

The App uses Google Analytics for Firebase to understand how the App is used and to improve its quality. Google Analytics for Firebase may automatically collect the following information:

• App instance ID (an identifier assigned to each installation of the App)
• Advertising ID
• App usage information (first launch, sessions, screens viewed, etc.)
• Device information (model, OS version, language settings, etc.)
• Approximate location (country or region, estimated from the IP address)

Memo titles and memo content are never sent to Google Analytics for Firebase.

For more details, please refer to How Google uses information from sites or apps that use its services.

2. How We Use Information

The information handled by the App is used for the following purposes:

• Providing memo functionality: Creating, editing, deleting, and searching memos
• Providing backup functionality: Backup and restore features for memos
• Displaying advertisements: To maintain the free availability of the App
• App improvement: Analyzing how the App is used to improve its quality and features (Google Analytics for Firebase)

3. Sharing Information with Third Parties

3.1 Google AdMob

The App uses the following third-party service for ad delivery:

• Service Name: Google AdMob
• Provider: Google LLC
• Information Shared: Information listed in "1.3 Advertising-Related Information" above
• Privacy Policy: https://policies.google.com/privacy

3.2 Google Analytics for Firebase

The App uses the following third-party service for usage analysis:

• Service Name: Google Analytics for Firebase
• Provider: Google LLC
• Information Shared: Information listed in "1.4 Analytics Information" above
• Privacy Policy: https://policies.google.com/privacy

3.3 Other Third-Party Sharing

The App does not share information with any third parties other than those mentioned above, except in the following cases:

• With user consent
• When required by law
• When necessary to protect life, body, or property

4. Data Storage and Management

4.1 Local Storage

All memos created in the App are stored in a database on the user's device. The Developer cannot access this data.

4.2 Backup Files

When using the backup file creation function, data is saved to the "Downloads" folder on the device. Users can back up the saved backup files (Chi-tan_xxxx_xxxx.csv) to any cloud service (such as Google Drive).

Note: When saving backup files to a cloud service, that service's privacy policy applies.

4.3 Data Deletion

Users can delete their data at any time using the following methods:

• Delete individual memos within the App
• Uninstall the App (all local data will be deleted)
• Use "Clear app data" from the device settings

5. Ad Personalization

Users can opt out of ad personalization through Android settings:

1. Open "Settings" on your Android device
2. Select "Google" → "Ads"
3. Enable "Opt out of Ads Personalization"

6. Children's Privacy

The App provides the same service to all users regardless of age and does not intentionally collect personal information from children under 13 years of age.

Memos created in the App are stored only on the device, and the Developer cannot access children's information. However, the advertising service (Google AdMob) and the analytics service (Google Analytics for Firebase) may collect information regardless of age.

If a parent or guardian has any questions about their child's information, please contact us using the information below.

7. Changes to This Privacy Policy

The Developer may update this Privacy Policy as necessary. In case of significant changes, we will notify you through in-app notifications or update information. The latest Privacy Policy will always be available on this page.

8. Contact Us

9. Governing Law and Jurisdiction

This Privacy Policy shall be governed by and construed in accordance with the laws of Japan. Any disputes related to the App shall be subject to the exclusive jurisdiction of the court having jurisdiction over the Developer's location.