Privacy and cookies
The short version: there are no accounts, what you enter stays on your own device, and analytics cookies are optional.
What stays on your device
If you choose your age, fitness level and preferences, or use the progress log, that information is saved in your own web browser using local storage. It is not sent to us, we cannot see it, and it is not shared. It stays until you clear your browser data, or delete it using the controls on the page. Clearing your browser data on another device does not affect it, and it is not copied between devices.
- Your profile (age group, fitness level, goals, preferences): stored in your browser so the site can remember your choices.
- Your progress log: stored in your browser only. You can export it as a file or delete it on the progress log page.
- Your analytics choice: a small note saying whether you accepted or declined analytics cookies.
Optional analytics cookies
We use Google Tag Manager and Google Analytics to count visits and see which pages are useful, so we can improve the site. The Google tag is present on every page of the live site, but it starts with analytics storage switched off. Until you click Accept on the cookie notice, no analytics cookies are set and nothing is stored on your device. Google may still receive a basic request when a page loads, which can include your IP address and the page being viewed, but without cookies and without being linked to a returning visit.
If you click Accept, analytics cookies with names starting _ga are set and Google receives anonymous usage information, such as the pages you view, the kind of device and browser you use and your approximate location. Your profile and progress log are never included. If you click No thanks, or ignore the notice, analytics storage stays off.
Changing your mind
You can change your choice at any time with here or in the footer of any page. Declining switches analytics storage off again and removes the analytics cookies we set.
Other things to know
- Like most websites, our web server keeps standard technical logs, such as the address of the page requested, for running and securing the site.
- Some pages link to other websites, for example research sources. They have their own privacy policies.
- This site gives general information, not medical advice. See the About page for how the content is prepared.