Privacy

Privacy Policy

Last updated: April 16, 2026.

Shikaku is designed to be lightweight, but some features still require us to process limited information so the site can function, save progress, and operate public puzzle tools. This page explains, in plain language, what information may be stored or collected when you use the site.

Information You Provide

If you submit a daily result, create a shared challenge, or send us an email, you may provide information such as a username, creator name, message text, puzzle data, or your email address. Public features such as daily leaderboards or shared challenge pages may display the names or content you choose to submit.

Information Stored In Your Browser

The site may use local browser storage to remember things like practice progress, recent play history, streak state, interface preferences, and device-specific identifiers that help certain gameplay features work consistently between visits on the same browser.

Analytics And Technical Data

We may use analytics and basic server or hosting logs to understand site traffic, page performance, browser types, and feature usage. This information is used to improve reliability, fix issues, and understand which parts of the site are being used most often.

How Information Is Used

We use information to operate the site, display public game features, maintain archives and leaderboards, improve usability, investigate bugs, respond to support requests, and protect the service from misuse.

Sharing And Retention

We do not sell your personal information. Some information may be shared with service providers that support hosting, analytics, or site operations, and public submissions may remain visible where they are part of the product itself, such as leaderboards, archive summaries, or shared challenge pages.

Your Choices

You can clear local browser data through your browser settings at any time. If you want to ask about a public submission, request a correction, or contact us about privacy, email anqigeFrank@gmail.com.