SumRowStudio
Effective October 23, 2026. This page covers The Toolkit at sumrowstudio.com — what the site collects (very little), how advertising cookies work, and who to contact.
Every calculator and converter on this site runs entirely in your browser. The numbers you type are never sent to us, stored by us, or tracked by us. There are no accounts and no sign-ups. The only cookies that may ever be set on this site come from advertising, explained below.
Nothing leaves your device. Each tool is a plain static page: you type numbers, the page does the math locally, and the result is shown to you. Closing the page discards everything. We have no server-side database of calculations, because there is nothing to put in one.
The site itself sets no cookies and uses no fingerprinting. If that ever changes, this policy will be updated first and the change noted with a new effective date.
This site is supported by advertising served through Google AdSense. That means:
• Third party vendors, including Google, use cookies to serve ads based on a user’s prior visits to this website or other websites.
• Google’s use of advertising cookies enables it and its partners to serve ads to users of this site based on their visits to this site and/or other sites on the Internet.
• You may opt out of personalized advertising by visiting Google’s Ads Settings: www.google.com/settings/ads. You can also opt out of some third-party vendors’ use of cookies for personalized advertising at www.aboutads.info/choices.
Advertising cookies are set by Google and its partners, not by our calculators. Blocking cookies in your browser will not break any tool on this site.
Some pages link to spreadsheet products sold through Gumroad (sumrowstudio.gumroad.com). Those links are plain hyperlinks — clicking one takes you to Gumroad, where Gumroad’s own privacy policy and cookie practices apply to anything you do there, including checkout. We do not embed Gumroad trackers or widgets on this site, and we receive no information about you from Gumroad beyond aggregate sales reporting for our own products.
We do not run third-party analytics trackers (no Google Analytics, no social pixels) on this site. Our hosting provider may keep standard, short-lived server logs — the page requested, time, and IP address — for security and reliability, the way most hosts do. We do not use those logs to build profiles of visitors.
The tools are general-audience calculators. We do not knowingly collect information from anyone, including children under 13 — as described above, there is nothing here that collects it.
If we add a feature that changes anything described here — new advertising partners, analytics, accounts — we will update this page and its effective date before, or at the same time as, the change goes live.
Questions about this policy: ryedmir@gmail.com.
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Every tool on this site runs in your browser. Nothing you type is sent anywhere, stored, or tracked.