Susano Technology LLC ("we", "us", or "our") operates the Kotoba application ("Kotoba" or the "App").
Kotoba is a Japanese vocabulary learning application designed to help users learn and review Japanese vocabulary through quizzes, vocabulary lists, and personalized learning progress.
This Privacy Policy explains what information we collect, how we use it, how we protect it, and how users can request deletion of their account and associated data.
By using Kotoba, you agree to the practices described in this Privacy Policy.
Depending on how you use Kotoba, we may collect the following information.
When you create a Kotoba account, we may collect:
Passwords are handled through our authentication service and are not stored by Kotoba in plain text.
To provide personalized learning features, Kotoba may store information related to your learning activity, including:
We may collect information that you voluntarily provide while using the App, such as your name or other information necessary for your account or learning experience.
Kotoba does not intentionally collect precise location information, contacts, SMS, call logs, photos, or health information for its core learning functionality.
If technical or security information is collected by services used to operate the App, such information is handled according to the applicable service providers' policies and the purposes described in this Privacy Policy.
We use the information described above to:
We do not sell users' personal information.
We take reasonable technical and organizational measures to protect user information against unauthorized access, alteration, disclosure, or destruction.
Data transmitted between the App and our services may be protected using appropriate encryption technologies such as HTTPS/TLS.
However, no method of electronic transmission or storage can be guaranteed to be completely secure.
We retain account and learning information for as long as necessary to provide Kotoba and its learning features.
We may retain certain information for a limited period when reasonably necessary for security, fraud prevention, legal compliance, dispute resolution, or other legitimate purposes.
When information is no longer necessary, we will delete or anonymize it in accordance with our applicable data retention practices.
Users may request deletion of their Kotoba account and associated personal data.
Users may request account deletion through the account/profile section of Kotoba, where this functionality is provided.
Users may also request account and associated data deletion by contacting:
Subject: Kotoba Account Deletion Request
The request should include the email address associated with the Kotoba account.
After verifying the request, we will delete the account and associated personal data, except where we are legally required or permitted to retain certain information.
Where information must be retained for legitimate legal, security, or other permitted purposes, we will retain only the information necessary for that purpose.
Kotoba is an educational application and may be used by students.
We do not intentionally collect more personal information than is necessary to provide the App's core functionality.
If a parent or legal guardian believes that a child has provided personal information to us inappropriately, they may contact us using the contact information below.
Upon receiving a valid request from a parent or legal guardian, we will review the request and take appropriate action in accordance with applicable laws and Google Play requirements.
Kotoba may use third-party services necessary to operate the App.
These services may process information on our behalf, including account and authentication information and learning-related data.
Currently, Kotoba uses Supabase for backend and authentication services.
Third-party service providers may have their own privacy policies governing their processing of information.
We may update this Privacy Policy from time to time to reflect changes to Kotoba, our data practices, applicable laws, or service requirements.
When we make significant changes, we will update the "Effective date" at the beginning of this Privacy Policy.
We encourage users to review this Privacy Policy periodically.
If you have questions about this Privacy Policy, your personal information, or account/data deletion, please contact us: