Privacy Policy

This Privacy Policy explains how KenLog, a kendama practice log app (the "App"), handles information about its users.

1. Information We Collect

The information the App collects depends on how you use it.

Account information (only when you sign up or log in)
Your email address, password, and nickname (display name). This information is stored on the servers of Google Firebase Authentication, which the App uses for sign-in, and your password is stored in hashed form. The developer and operator of the App cannot see your password in plain text.
Information used in Practice together (KWC rooms)
Your nickname, practice results and scores, and user ID. This information is temporarily stored in Firebase Realtime Database so that results can be synchronized with the other participants in real time. It is kept per room and is deleted when you leave the room or when the room ends (for example, when the host leaves or loses their connection). In rare cases, such as when the App is force-quit during practice, this data may remain without being deleted.
Practice records, trick lists, tags, and other in-app data
Your trick practice records, Kendama Kentei Test progress, tags you create, and similar data are stored only on your device. This data is never sent to any external server. (You can also use the App as a guest without logging in.)

The App does not include any advertising SDKs or analytics SDKs. We do not collect your activity for advertising purposes or provide it to third parties.

2. How We Use Information

To let you log in to the App and to verify your identity
To identify participants and synchronize results in Practice together (KWC rooms)
To respond to your inquiries

3. Third Parties and Service Providers

The App uses Firebase, provided by Google LLC, for authentication and as its database. For details on how Firebase handles information, please also see the following Google policies.

Except as described above or as required by law, we do not provide your information to third parties without your consent.

4. Cookies and Tracking Technologies

The App does not track you using cookies, advertising identifiers, or similar technologies.

5. Data Retention and Deletion

You can permanently delete your account information at any time from Settings > Delete Account in the App. After deletion, you will no longer be able to log in with that account.

6. Use by Children

If you are a minor, please use the App with the consent of your parent or guardian.

7. Changes to This Policy

This Policy may be changed without prior notice due to changes in laws, new features in the App, or other reasons. If there are significant changes, we will let you know by updating the date on this page.

8. Contact

For questions about how the App handles information, or to request disclosure or deletion of your information, please contact us at:

Email: mayahara.dev@gmail.com

This is an English translation of the Japanese Privacy Policy. If there is any discrepancy between the two versions, the Japanese version prevails.