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PLS by device brand

PLS by device brand without noise

Vasil Dachev avatar
Written by Vasil Dachev
Updated over a week ago


What is PLS by device brand

PLS by device brand shows how Perceived Load Speed (PLS) varies across different device brands. It helps you identify whether users on specific brands (like iPhone, Android, Windows, Mac, etc.) are experiencing slower or faster perceived load times.

PLS is Uxify’s real-user performance metric that reflects the moment a page feels visually ready. Since device brands often correlate with hardware quality, browser behavior, and screen resolutions, this lens offers important insights into how brand-specific characteristics affect perceived speed.

Different brands optimize hardware and browsers differently. For example:

  • Apple devices often run Safari with custom rendering behaviors.

  • Android brands vary widely in CPU, memory, and screen density.

  • Windows and Mac machines have different font rendering and network handling.

Understanding brand-specific performance helps you fine-tune UX across your user base.

Healthy PLS by device brand sample


Should you worry

A healthy view shows consistent, green PLS values across all major brands — meaning the page feels fast for all users regardless of their device manufacturer.

If one or more device brands show elevated PLS values, users on those devices may be experiencing delays — even if the rest of your audience sees a fast load.

This can be due to:

  • Lower-end hardware bundled with some Android brands

  • Slower rendering paths in certain browsers

  • Larger screens requiring more layout shifts or image scaling

  • Under-optimized content or scripts for a specific platform

Addressing these brand-specific gaps can have a strong impact on user engagement, especially if the affected brand represents a significant portion of your traffic.

Unhealthy PLS by device brand sample

Unhealthy trends usually reveal a few brands with noticeably slower PLS. For example, iPhones may show faster perceived loads than mid-range Android devices, or Windows desktops may lag behind Macs due to browser or layout differences.

When the difference is stark, it impacts the perceived quality and performance of your site — and users may bounce as a result.

Resolving unhealthy PLS by device brand

Go-to action plan to resolve an unhealthy PLS by device brand:

  1. Ask Uxi to analyze your PLS by device brand and suggest improvements.

  2. Use Filters to break down those brands by other lenses (e.g. CPU performance, browser, connection type) to understand root causes.

  3. Simulate LCP of the suspected lens to see if fixing it will resolve the PLS by device brand. If yes, this is where the resolution focus should be.

  4. Use an automated optimization tool like Navigation AI to improve your PLS by device brand.

  5. Once you’ve improved PLS, set an alert to be the first to know if it starts worsening again.

Try it yourself

Discover how your website performs with real user data.

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