themestestedbyWhirlwind eCommerce logo — Shopify and BigCommerce ecommerce development agencyWhirlwind eCommerce
Strong theme preview

Strong

Strong is a Shopify theme by BoostifyThemes ($100). Tested on 2026-10-12 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 64 for mobile speed and 86 for desktop speed, 97/97 for SEO and 90/93 for accessibility (mobile/desktop, 0–100). Those are medians across its 3 tested presets; mobile speed across every tested page ranges from 56 to 93. On its marketplace it is rated 5.0 out of 5 from 7 reviews.

Mobile56
Strong home page on mobile
Desktop88
Strong home page on desktop

Scores

MobileDesktop
Speed6486
SEO9797
Accessibility9093
Best practices9696

Median of 3 presets · measured 36 times since 2026-09-11 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.

Why not 100 — Strong home page

Mobile

Speed 56 · 44 points to gain

  • −24.5 Largest Contentful Paint medium effort
  • −9.5 Cumulative Layout Shift medium effort
  • −5.3 Speed Index medium effort
  • −2.7 Total Blocking Time medium effort
  • −1.8 First Contentful Paint medium effort
  • 300 ms Reduce unused CSS high effort

SEO 92 · 8 points to gain

  • −7.7 Links do not have descriptive text low effort

Accessibility 90 · 10 points to gain

  • −4.8 Buttons do not have an accessible name medium effort
  • −3.4 Background and foreground colors do not have a sufficient contrast ratio. medium effort
  • −1.4 Heading elements are not in a sequentially-descending order medium effort

Best practices 96 · 4 points to gain

  • −3.8 Browser errors were logged to the console medium effort

Desktop

Speed 88 · 12 points to gain

  • −7.8 Largest Contentful Paint medium effort
  • −4.7 Speed Index medium effort

SEO 92 · 8 points to gain

  • −7.7 Links do not have descriptive text low effort

Accessibility 92 · 8 points to gain

  • −3.4 Background and foreground colors do not have a sufficient contrast ratio. medium effort
  • −3.4 Touch targets do not have sufficient size or spacing. medium effort
  • −1.4 Heading elements are not in a sequentially-descending order medium effort

Best practices 96 · 4 points to gain

  • −3.8 Browser errors were logged to the console medium effort

Presets and pages

Preset / pageSpeedSEOA11ySpeedSEOA11yTested
mobiledesktop
Bend demo ↗ 649790889793 2026-10-12
category ↗ 70100908210092 2026-10-12
home ↗ 609290889292 2026-10-12
product ↗ 63100919310095 2026-10-12
Strong default demo ↗ 639790869793 2026-10-12
category ↗ 68100907810092 2026-10-12
home ↗ 569290889292 2026-10-12
product ↗ 64100919210095 2026-10-12
Velvet demo ↗ 77100908510093 2026-10-12
category ↗ 70100908110092 2026-10-12
home ↗ 93100908110092 2026-10-12
product ↗ 67100919310095 2026-10-12

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Strong: mobile speed 64 on Themestested
<a href="https://themestested.com/theme/shopify/strong"><img src="https://themestested.com/badge/shopify/strong.svg" alt="Strong speed score on Themestested" height="20"></a>

Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.