Last updated: July 2026

Introduction

TethTechLabs ("we," "us," or "our") is an independent app studio based in Japan. This Privacy Policy explains how we collect, use, and protect information when you use our website at tethtechlabs.com and our mobile and web applications.

We are committed to handling personal information responsibly and transparently. When you use our services, this policy describes how your information may be handled.

Information We May Collect

Depending on the application or service you use, we may collect the following types of information:

  • Account and contact information — such as your name, email address, or other details you provide when creating an account or contacting us.
  • App usage information — such as features used, session duration, and interaction patterns within our applications.
  • Learning and activity data — such as study progress, practice results, collection entries, or preferences you save within an app.
  • Device and diagnostic information — such as device type, operating system version, app version, crash reports, and performance logs.
  • Website usage data — such as pages visited and general traffic information when you browse our website.

The specific data collected varies by application. Each app may provide additional details within the app or in a separate app-specific privacy notice.

How We Use Information

We use collected information for purposes including:

  • Providing, operating, and improving our applications and services
  • Personalizing your experience and saving your preferences and progress
  • Responding to support requests and inquiries
  • Monitoring performance, diagnosing issues, and fixing bugs
  • Understanding how our products are used to guide development
  • Complying with legal obligations when required

We do not sell your personal information to third parties.

Third-Party Services

Our applications and website may use third-party services to support functionality such as:

  • Authentication and account management
  • Cloud hosting and data storage
  • Analytics and usage measurement
  • Crash reporting and error monitoring
  • Payment processing (where applicable)

These third-party providers process data according to their own privacy policies. We select providers that maintain appropriate security practices, but we encourage you to review their policies as well.

Data Security

We implement reasonable technical and organizational measures to protect information against unauthorized access, alteration, disclosure, or destruction. However, no method of transmission or storage is completely secure, and we cannot guarantee absolute security.

Data Retention

We retain information for as long as necessary to provide our services, fulfill the purposes described in this policy, and comply with applicable legal requirements. When information is no longer needed, we take steps to delete or anonymize it.

Your Rights and Choices

Depending on your location and applicable law, you may have rights to access, correct, delete, or restrict the processing of your personal information. You may also withdraw consent where processing is based on consent.

To exercise these rights or request information about your data, please contact us at the address below.

Children's Privacy

Our services are not directed at children under the age of 13 (or the applicable age in your jurisdiction). We do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will take appropriate steps to remove it.

International Users

TethTechLabs is based in Japan. If you access our services from outside Japan, your information may be transferred to and processed in Japan or other countries where our service providers operate.

Changes to This Policy

We may update this Privacy Policy from time to time. When we make changes, we will revise the "Last updated" date at the top of this page. We encourage you to review this policy periodically.

Contact

If you have questions about this Privacy Policy or our data practices, please contact:

TethTechLabs
1-10-8 Dogenzaka, Shibuya-ku, Tokyo 150-0043, Japan
Email: info@tethtechlabs.com