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title: "INP on Mobile vs Desktop: 97.9% of Desktop Sites Pass, Only 82.5% on Mobile - PageSpeed Matters"
description: "We measured Interaction to Next Paint across 18 million websites. On desktop it is all but solved, with 97.9% passing. On mobile just 82.5% do, the widest device gap of any Core Web Vital."
lang: en
json-ld:
---

[INP on Mobile vs Desktop: 97.9% of Desktop Sites Pass, Only 82.5% on Mobile](https://www.pagespeedmatters.com/resources/data-studies/inp-device-gap)

We measured Interaction to Next Paint across 18 million websites. On desktop it is all but solved, with 97.9% passing. On mobile just 82.5% do, the widest device gap of any Core Web Vital.

INP pass rate by device

Desktop

97.9% 

Mobile

82.5% 

Source: PageSpeed Matters analysis of Chrome UX Report field data, May 2026.

Responsiveness is nearly universal on desktop and materially worse on phones, a 15.4 point split.

Device gap by Core Web Vital (desktop minus mobile, points)

INP (responsiveness)

15.4 pts 

LCP (loading)

11.8 pts 

CLS (stability)

5.2 pts 

Source: PageSpeed Matters analysis, mobile and desktop 75th-percentile field data, May 2026. CLS is mobile-better.

If you want one number that captures the mobile web running on weaker hardware, INP is it.

Source: [INP on Mobile vs Desktop: 97.9% of Desktop Sites Pass, Only 82.5% on Mobile - PageSpeed Matters](https://www.pagespeedmatters.com/resources/data-studies/inp-device-gap)