Privacy Policy
Effective 2026-07-04 (pre-order stage — will be revised at full launch)
Our first principle: camera frames are processed only inside the device and are never stored or transmitted. The server has no capability to receive video.
1. What we collect (pre-order stage)
- Required: email address — for launch and early-bird notifications
- Optional: name, user type (parent/student/teacher) — to tailor updates
Pre-ordering is not a payment; we collect no payment information.
2. Retention
Kept until launch notifications are complete or you request deletion, then destroyed without delay.
3. Third parties
We never sell or share your information. We engage the following processors to the extent needed to operate the service.
| Processor | Purpose | Location |
|---|---|---|
| Resend, Inc. | Sending pre-order confirmation and announcement emails | USA · Japan |
| Dothome Co., Ltd. | Website hosting and storage of submitted information | South Korea |
Any change of processor or purpose will be announced in this policy.
4. Your rights
Request access, correction, or deletion anytime: mail@concentration-cube.xyz. The full service will support in-app bulk deletion of profiles and session data.
5. Children
Sign-up for children under 14 requires parental consent (handled at service registration). Please pre-order under a guardian's name.
6. Data principles of the full service (preview)
- Student profiles use a name (nickname is fine) and birth date only — used solely for age-appropriate interpretation
- Measurement data is a numeric time series — it contains no facial video
- Encrypted in transit (HTTPS); destroyed with account deletion