Chelly allows you to inject custom HTML into your website:

You can use this to inject code for your analytics scripts, such as Google Analytics:
html<!-- Google tag (gtag.js) --><script async src="https://www.googletagmanager.com/gtag/js?id=TRACKING_ID"></script><script>window.dataLayer = window.dataLayer || [];function gtag(){dataLayer.push(arguments);}gtag('js', new Date());gtag('config', 'TRACKING_ID');</script>
Replacing the
TRACKING_ID
above with your Google Analytics tracking ID.