Last updated: July 2026
Your inputs
All calculations on DaySums run locally in your web browser using JavaScript. The dates, times, and numbers you type into any tool are never transmitted to, stored on, or processed by our servers. Closing the page discards them.
Information we collect
DaySums has no user accounts and collects no personal information directly. Our hosting provider may keep standard, short-lived server logs (IP address, browser type, pages requested) for security and capacity purposes.
Advertising and cookies
DaySums is funded by advertising. Third-party advertising partners (such as Google AdSense) may use cookies or similar technologies to serve ads, including personalized ads based on your prior visits to this and other websites.
- Google's use of advertising cookies is described at policies.google.com/technologies/ads.
- You can opt out of personalized advertising at Google Ads Settings or aboutads.info/choices.
- Visitors in the EEA/UK will be shown a consent prompt before any advertising cookies are set.
Analytics
If analytics are used, we prefer privacy-focused, cookieless measurement (aggregate page-view counts) rather than individual tracking.
Children
DaySums is not directed at children under 13 and knowingly collects no information from them.
Contact
Questions about this policy? Email [email protected].