Privacy in plain language
You can use the public tools without an account. Browser-only worksheet text stays on your device unless a feature clearly says otherwise.
Main privacy points
- Accounts: public puzzle tools do not require one.
- Messages: email is used to answer and investigate your request.
- Service data: standard logs may support security and reliability.
Information we collect
The public puzzle tools are designed to work without an account. Text entered into browser-only worksheets and the daily practice log is stored in your browser and is not sent to our server unless a feature clearly says otherwise. Standard server logs may record an IP address, requested URL, browser information, and time for security and reliability.
Analytics and advertising
We may use privacy-conscious analytics and display advertising. If Google advertising is enabled, third-party vendors including Google may use cookies to serve ads based on a visitor's earlier visits to this site or other sites. Google's advertising cookies allow Google and its partners to personalize advertising. Any other advertising vendors or networks used by problem.so will be identified here or through the consent controls available to the visitor.
Where the law requires consent for non-essential cookies or local identifiers, advertising and measurement services should remain disabled until that choice is recorded. Visitors can manage personalized Google advertising through Google Ads Settings. Browser controls can also restrict or delete cookies, although doing so may affect some site features.
Messages
If you email us, we use the message and address to respond, investigate the request, and retain an appropriate record. Do not send confidential or sensitive personal information.
Your choices
You may request access, correction, or deletion of personal information we control through the problem.so contact page. Browser controls can restrict cookies and local storage. The terms of use describe the conditions for using the public tools and content.