Privacy

Updated September 14, 2026

Your work stays on your device

Equations are calculated in your browser. Turn In processes documents on your device and saves assignments in this browser’s IndexedDB. We do not upload equations, document contents, filenames, assignment names, or exported PDFs to our analytics service.

Optional usage measurement

If you choose to allow analytics, the site sends a page category and a small set of actions, such as solving a system or downloading a PDF, to this site’s own server. We store daily totals by tool and action, plus a broad referral category (direct, search, social, or other). We do not store visitor identifiers, analytics cookies, IP addresses, complete referrer URLs, or browsing histories in the analytics database. These totals measure activity, not unique people.

Analytics are off until you allow them. Your choice is saved on this device. Use “Analytics choices” in the footer to change it. Do Not Track and Global Privacy Control signals disable collection. Previously counted activity remains in aggregate totals; it cannot be linked back to you. Aggregate totals are kept to compare usage over time.

Hosting and local storage

The hosting provider processes network information needed to deliver and protect the website, which can include IP addresses and technical logs. The app caches its assets for offline use and stores your analytics preference locally. Clearing site data removes local assignments, preferences, and offline files. Download backups before doing so.

Advertising

No advertising scripts are enabled. If advertising is introduced, this notice and the relevant consent controls will be updated before ads are enabled.

Owner reports

The aggregate report is restricted to the site owner through ChatGPT sign-in. Visitors do not need to sign in to use the tools.