Privacy Policy

This Privacy Policy explains what information the website HanoiStack (hanoistack.com, "the site", "we") handles when you visit and play. The short version: we do not collect, store or share any personal information. The site is owned and operated independently; if you have any questions, contact us at support@hanoistack.com.

Information we do not collect

• No accounts or registration. You can play everything without signing up, so we never ask for your name, email address or payment details.
• No analytics or tracking. The site runs no analytics services, no advertising networks, no third-party trackers and no social media pixels.
• No server-side storage of your data. There is no user database: nothing you do on the site is transmitted to us and stored on a server.

What is stored in your browser

Your streaks, completed daily puzzles, best scores and difficulty preferences are saved using your browser's built-in local storage, under keys beginning with hanoistack:. This data:

• never leaves your device — it is not sent to us or to anyone else;
• stays on the browser and device you used, so clearing your browser data or using a different device simply starts fresh;
• can be deleted at any time by clearing site data in your browser settings.

Like most websites, our hosting provider's infrastructure processes standard, short-lived technical logs (such as IP address and requested URL) for security and availability purposes. We do not use these logs to profile you.

Children's privacy

The site is family-friendly and designed to be safe for all ages. Because we collect no personal information from anyone, we necessarily collect none from children either. Parents and teachers can let kids play with confidence.

Sharing features

The "Share" buttons copy a short text summary of your result to your device's clipboard so you can paste it wherever you like. Nothing is sent anywhere unless you choose to paste and send it yourself.

External links

Some pages may link to other websites. We are not responsible for the privacy practices of those sites; please review their policies separately.

Changes to this policy

If we ever change how the site works in a way that affects privacy, we will update this page and change the effective date above.

Contact

For any privacy question or request, email us at support@hanoistack.com.