Privacy policy

Last updated: September 2026

The short version

No accounts. No tracking cookies. Your practice scores, streaks, and settings live in your browser's local storage on your device — never on our servers.

Details

• Local storage: best scores, daily-challenge state, and streak counts are saved in your browser's localStorage. Clearing your browser data deletes them. We never receive them.
• Analytics: we use Cloudflare Web Analytics, which is cookieless and does not identify individual visitors. It reports aggregate page views and basic, anonymized request data.
• No accounts, no newsletter (yet): if a newsletter is added later, it will be strictly opt-in.
• Advertising: if ads are introduced in the future, this policy will be updated before they appear, and ads will never be placed near active question inputs.
• Children: NumThink does not knowingly collect any personal information from children.

Questions? Get in touch.