Web vitals
Speed you can see, next to the traffic it costs.
Flatlytics measures Core Web Vitals from the people actually using your site, and puts them on the same screen as the pages and sessions they affect. A slow page and what it costs you, together.
Real visitors, not a lab run.
Synthetic tests tell you how one machine loads your page once. Field data tells you how your actual audience experiences it, on their devices and their networks. Flatlytics collects the latter.
- LCP, INP and CLS sampled from real sessions as they happen.
- Broken down by page, so you fix the ones that matter first.
- Next to the traffic each page carries, so effort follows impact.
The three metrics, and where the line is.
Each metric has a plain threshold for good and poor. We use Google's, and we show you which of your pages fall where.
LCP, Largest Contentful Paint
How soon the main content appears. Good ≤ 2.5s, poor > 4s.
INP, Interaction to Next Paint
How quickly the page responds when someone taps or clicks. Good ≤ 200ms, poor > 500ms.
CLS, Cumulative Layout Shift
How much the layout jumps around while loading. Good ≤ 0.1, poor > 0.25.
Straight about coverage
What field data can and can't tell you.
It's a sample, and we say so
Trends over single numbers
See your real-world speed.
Install one tag and watch Core Web Vitals arrive from your actual visitors, page by page.