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 an account. A few fields can stay in this browser so related tools share them. Calculator pages do not collect names, email addresses, or other personal data. If you use the contact form, Fillout processes that message and delivers it to the operator.
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
- age, comparison category, optional heart-rate numbers, and the last race on the running performance calculator
- 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.
Contact form
The contact page embeds a form hosted by Fillout. Fillout receives the contents of the form, the technical data needed to serve the embed, and an email address if you include one. We use that submission to read your feedback and, if you left an email, to reply. Runners Lab has no account database of contact messages.
You can email yanchi@yanchi.space instead of using the form. To ask for a contact message to be erased, use that same address. Fillout’s own policy is at www.fillout.com/privacy.
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, shared performance inputs, and your cookie choice. The contact form is processed by Fillout so we can read the message you send. 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 send a contact message, Fillout processes that submission. 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, we will update this page and the cookie policy first.