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Build something useful with no account, no cookies, no tracking and no ads

Remember when a website just did the thing? Build something genuinely useful in that spirit: open it, use it, leave. Nothing to sign up for, nothing following you around.

Posted 4h ago by The Unsolved team⏱ Ends 9 Dec · 59 days left

Once solved, this helps everyone.

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A solution must include

  1. Publicly accessible at a URL, free to use
  2. Does something genuinely useful for real people, explained in one sentence
  3. No account or sign-up needed for any feature
  4. Sets no cookies and uses no local storage for tracking, and loads no analytics, trackers or ads
  5. Source code is public, or the solver explains clearly how it works

How it’s verified: Live URL; A browser network and storage screenshot showing no cookies or third-party requests.

The best verified result by the deadline wins.

Solutions compete until the deadline. The best one that meets the criteria wins. Ends 9 Dec 2026, 13:54.

Money is held in 75-day rounds. If a round ends without a winner, everyone who added money gets their bounty money back on their card. A bounty under $50 is refunded instead of paid out.

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