Privacy Policy - HSK One
Quick Answer: HSK One requires no account to learn. Anonymous progress is stored only in your browser (localStorage). We do not sell, share, or monetise your personal data. No third-party ads or trackers.
Last updated: July 2026. This policy applies to hskone.com and all subdomains.
What We Collect
- Anonymous learners: nothing. Progress is stored in your browser's localStorage and never sent to our servers.
- Registered users (optional): username and hashed password. Used solely for cross-device progress sync.
- Server logs: standard Cloudflare access logs (IP, user-agent, timestamp) retained 30 days for security.
What We Do NOT Do
- No third-party advertising or ad trackers
- No selling or sharing personal data with third parties
- No cookies for tracking (only essential session cookie if logged in)
- No analytics scripts that fingerprint your device
Data Storage
All server-side data is stored in Cloudflare D1 (EU/US regions). Anonymous localStorage data never leaves your device. If you register, your username and progress are stored encrypted at rest.
Your Rights
- Access: request a copy of your stored data
- Deletion: request account and data removal at any time
- Portability: export your progress data
- No automated decision-making or profiling is performed
Children
HSK One is designed for adults (18+). We do not knowingly collect data from children under 16. If you believe a child has created an account, contact us for immediate deletion.
Contact
For privacy questions or requests: privacy@hskone.com
Frequently Asked Questions
Do you use cookies?
Only a single essential session cookie if you log in. No tracking cookies, no advertising cookies.
Can I use HSK One without giving any personal data?
Yes. The entire learning experience works anonymously. Progress is saved in your browser only.
Do you share data with third parties?
No. We do not sell, rent, or share personal data with any third party.