Privacy policy

Last updated: 24 October 2026

Your game data

Sudoku Nonet has no accounts. Your games, settings and statistics are stored only in your browser's local storage on this device. We never receive them. Clearing your browser data removes them.

Advertising

Sudoku Nonet shows no banners or pop-ups. Only when you choose to, for an extra hint or to play on after three mistakes, you watch a short video ad from Google AdSense. Offline there are no ads at all.

To show these ads, third-party vendors, including Google, use cookies or similar technologies. If you agree, Google and its partners also use them to show ads based on your visits to this and other websites. Visitors from the EU, the UK and Switzerland are asked for their consent first. Read how Google uses information from sites that use its services. You can turn off personalised ads in Google's ad settings, and opt out of other vendors' cookies for personalised ads at aboutads.info.

Visitor statistics

To see how many people visit and which pages they use, we use Vercel Web Analytics. It sets no cookies and doesn't identify you: a visit is recognised only by a hash of the request, which is discarded after 24 hours, and page views are not linked to you or your IP address. For each page view it records the page, the referring site, your approximate location (country, region, city), browser, operating system and device type. We only see these numbers in aggregate.

Hosting

The site is hosted by Vercel, which processes technical data such as IP addresses in server logs to deliver and secure the site.