Privacy Policy

1. What we collect today

Using HayaGo requires an account. When you create one we store:

• Your email address and the name you choose, to sign you in and greet you.
• Your password, in scrambled form only (a one-way hash). We never store or see the password itself.
• Your plan (Free, Basic or Pro) and when you uploaded each game, to apply your plan's weekly upload limit.
• If you subscribe: which payment service you used (Stripe or PayPal), its reference numbers for your subscription and customer record, your plan, and when it renews or ends. Card and PayPal details are entered on Stripe's or PayPal's own pages and handled by them under their own privacy policies. HayaGo never receives or stores your card number.
• The games you upload (SGF files, including the player names, ranks and other details in them) and their analysis.
• Your player evaluation: the rank, mistake and style profile HayaGo builds from the games you played.

All of this is stored on HayaGo's server and tied to your account, so only you can see your games and evaluation once signed in. It is not sold or shared with advertisers.

2. The Analysis Helper

If you run the optional Analysis Helper (the KataGo-powered engine), your game data is sent from your browser to that helper to be analyzed. Today, that helper runs either on your own computer or, if HayaGo is deployed for you, on infrastructure we operate, solely to compute the analysis results shown back to you. It is not shared with any other third party or AI provider beyond the KataGo engine running as part of the Service itself.

3. Cookies and tracking

HayaGo uses one cookie, which keeps you signed in (it lasts 30 days, or until you sign out). It does not use analytics, advertising, or tracking cookies. Standard web server logs (e.g. IP address, timestamp, requested page) may be generated by the hosting infrastructure itself, as with any website.

4. What changes as HayaGo grows

How long data is kept after an account is closed (including subscription records, which may need to be kept for tax and accounting purposes) is not yet decided, and will be added here.

5. Your choices

• You can remove any game from your library at any time (✕ on the Library page).
• To have your account and everything tied to it deleted, contact us (below). There is no self-service button for this yet.

6. Contact

Questions about this policy, or requests about your data: [contact email to be added].