What is LCP by device brand
LCP by device brand shows the Largest Contentful Paint (LCP) grouped by known hardware categories - including specific iPhone models, Android phones, Mac and Windows desktops, and Linux systems.
Unlike broad categories like “Mobile” or “Tablet,” this view reflects real device families, letting you see how performance differs between an iPhone 13 Pro, a Windows laptop, or an Android midrange phone.
This lens is especially useful when investigating brand-specific slowdowns, optimizing for popular devices, or spotting outliers like aging desktops or resource-constrained phones.
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 device brand sample
Should you worry
A healthy lens will show green bars across all major device groups, with some variation expected — especially between high-end and budget devices.
For example:
Recent iPhones and Macs may consistently show fast LCP.
Android phones may vary based on hardware quality or OS/browser versions.
Windows PCs might show green overall but lag slightly on older machines or slower connections.
As long as there’s no yellow or red, and the device mix aligns with your expected audience, you’re in good shape.
Unhealthy LCP by device brand sample
A slow LCP from one or more specific device groups can indicate a deeper problem. Common causes include:
iPhones: Slow LCP might be linked to heavy images, custom fonts, or inefficient rendering in Safari.
Android phones: Performance gaps often come from underpowered devices, unoptimized JavaScript, or vendor-specific browser quirks.
Windows or Linux desktops: May underperform due to legacy hardware, outdated browsers, or poor GPU acceleration.
Macs: Rare, but slowness can result from excessive visual effects or layout complexity that stresses Safari.
Resolving unhealthy LCP by device brand
Go-to action plan to resolve an unhealthy LCP by device brand:
Ask Uxi to analyze your LCP by device brand values and suggest improvements.
Use Filters to zoom in on the underperforming device group and inspect their experience in other LCP lenses like navigation type, layout, or connection speed.
Simulate LCP of the suspected lens to see if fixing it will resolve the slow LCP by device brand. If yes, this is where the resolution focus should be.
Use an automated LCP optimization tool like Navigation AI to improve your LCP by device brand 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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