Privacy Policy

TenStella (sole proprietor; representative: Daisuke Ichimaru) is responsible for handling personal information on this site and in our apps. Our address and phone number are not published here but are disclosed without delay upon request — please contact us by email.

We keep this deliberately small:

• Information you provide. For example, the content of an email you send us, or account details if you use a product that requires an account.
• Information collected automatically. Privacy-respecting, aggregate usage data (such as pages viewed, device or OS type, and approximate region) and standard server logs (such as IP address and timestamps) retained briefly for security and reliability.

We use the limited information we hold to:

• Operate, maintain, and improve our products and website.
• Respond to your messages and provide support.
• Keep our services secure and prevent abuse.
• Meet legal and regulatory obligations.

We take a measured, practical approach to keeping information safe:

• Data is encrypted in transit over HTTPS.
• Access is limited to the people and systems that genuinely need it.
• We retain information only as long as necessary, then delete or anonymize it.

We rely on a small set of trusted providers to operate our products. They process data on our behalf under their own security and privacy commitments, and we share only what is necessary:

• Supabase — database and authentication.
• Cloudflare — hosting, content delivery, and security.
• Analytics tools — privacy-respecting, aggregate usage measurement.
• App distribution platforms — the Apple App Store and Google Play, for distribution and payment processing.

You may request disclosure, correction, addition, deletion, or suspension of use of the personal data we hold about you, as provided by applicable law. To make a request, email us using the contact below; we will verify your identity and respond without undue delay.

We do not sell personal information, and we do not use it to build advertising profiles.

Our products are not directed at children under 13. If a child uses a product that requires an account, a parent or legal guardian must consent on their behalf. If you believe a child has provided us personal information without appropriate consent, contact us and we will delete it.

Questions, requests, or complaints about how we handle personal information are always welcome. We aim to respond within a few business days.

Email us at:

[email protected]

We may update this policy from time to time. When we do, we will revise the date above and highlight material changes.