Who operates this site
This site is operated by the operator of runnerslab.app. For privacy questions, email yanchi@yanchi.space.
What we do not collect
Runners Lab has no user accounts and no server-side database of calculator inputs. You do not create a profile. In this version of the site we do not collect names, email addresses, or other personal data through the calculators. There is no contact form that stores a message on our servers.
What stays on your device
The site uses your browser’s localStorage to remember:
- kilometres or miles
- last 5K, 10K, half-marathon, and marathon target times
- your cookie-banner choice (accept or reject)
That information stays in your browser. We do not read it from a server. Clearing site data in your browser deletes it.
Analytics and advertising
If you accept optional cookies, we use Google Analytics 4 to measure visits and which calculators people use. Those events do not include race times or other calculator inputs. Google LLC processes that measurement data. Advertising, including Google AdSense, is not used. See the cookie policy for the cookies involved and how to refuse them.
Legal bases and EU visitors
Device-side preferences are stored because they are necessary for the site to remember units, race-pace targets, and your cookie choice. Google Analytics runs only if you accept optional cookies. You can change that choice on the cookie policy page. If you are in the EU/EEA or UK and want device data erased, clear this site’s data in your browser, or email yanchi@yanchi.space.
Third parties
The site is hosted by a web host. The host may process technical logs such as IP addresses as part of serving pages, according to that host’s own policy. If you accept analytics, Google processes measurement data under Google’s terms. We do not sell personal information. We do not have a customer database to sell.
Changes
If the site starts using advertising or any server-side collection of personal data, we will update this page and the cookie policy first.