What is LCP by App Referrer
LCP by App Referrer shows how different referring applications impact the Largest Contentful Paint (LCP) delays on your pages.
This lens helps you identify which apps - such as social media platforms, messaging apps, or embedded browsers - are sending traffic that results in slower page loading experiences.
Only app referrers that were active and measurable during the selected period are listed. LCP is the most popular vital from the Core Web Vitals and represents the loading time of the largest element on the page.
Healthy LCP by App Referrer sample
Should you worry
In a healthy view, app referrers have little to no impact on LCP. You may still see them listed, but they won’t appear in yellow or red. This means the traffic coming from these apps is not causing critical loading delays.
A healthy setup typically benefits from:
Optimized landing pages tailored to common app referrers.
Fast redirects and minimal overhead when users arrive from external apps.
Efficient caching strategies for app-originated traffic.
If your LCP remains green across the board for all app referrers, you’re in a strong position.
Unhealthy LCP by App Referrer sample
A high-impact app referrer on LCP means traffic from that app causes significant delays in loading the largest content — often due to:
Heavy or slow redirects triggered by the app.
Additional tracking or personalization scripts firing specifically for app traffic.
Suboptimal handling of app-originated user agents or network conditions.
Common culprits include:
Social media apps embedding content with added tracking.
Messaging apps using in-app browsers that load slower.
Partner apps injecting heavy scripts or ads on arrival.
If your LCP is red or yellow for a specific app referrer consistently, it signals that users coming from that app are experiencing slower load times and something needs optimizing.
Resolving unhealthy LCP by App Referrer
Go-to action plan to resolve an unhealthy LCP by App Referrer:
Ask Uxi to analyze your LCP by App Referrer values and suggest improvements.
Use Filters to isolate slow app referrer traffic on your key landing pages.
Simulate LCP of the suspected lens to see if fixing it will resolve the slow LCP by App Referrer. If yes, this is where the resolution focus should be.
Use an automated LCP optimization tool like Navigation AI to improve your LCP by App Referrer values.
Once you’ve improved LCP, set an alert to be the first to know if it starts worsening again.
Try it yourself
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