Arctos
Arctos is a Shopify theme by Ursus Ecom ($380). Tested on 2026-10-29 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 73 for mobile speed and 93 for desktop speed, 96/96 for SEO and 96/96 for accessibility (mobile/desktop, 0–100). Those are medians across its 2 tested presets; mobile speed across every tested page ranges from 70 to 80.
Mobile72
Desktop97
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 73 | 93 |
| SEO | 96 | 96 |
| Accessibility | 96 | 96 |
| Best practices | 95 | 94 |
Median of 2 presets · measured 10 times since 2026-09-12 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — arctos home page
Mobile
Speed 72 · 28 points to gain
- −19.5 Largest Contentful Paint medium effort
- −5.8 First Contentful Paint medium effort
- −2.9 Speed Index medium effort
- 300 ms Reduce unused JavaScript high effort
Accessibility 96 · 4 points to gain
- −3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −1.3 Heading elements are not in a sequentially-descending order medium effort
Best practices 92 · 8 points to gain
- −3.8 Browser errors were logged to the console medium effort
- −3.8 Issues were logged in the `Issues` panel in Chrome Devtools high effort
Desktop
Speed 97 · 3 points to gain
- −1.4 Speed Index medium effort
- −1 Largest Contentful Paint medium effort
Accessibility 96 · 4 points to gain
- −3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −1.3 Heading elements are not in a sequentially-descending order medium effort
Best practices 92 · 8 points to gain
- −3.8 Browser errors were logged to the console medium effort
- −3.8 Issues were logged in the `Issues` panel in Chrome Devtools high effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| arctos default demo ↗ | 76 | 100 | 97 | 96 | 100 | 98 | 2026-09-12 |
| category ↗ | 77 | 100 | 99 | 99 | 100 | 99 | 2026-09-15 |
| home ↗ | 72 | 100 | 96 | 97 | 100 | 96 | 2026-09-12 |
| product ↗ | 80 | 100 | 96 | 91 | 100 | 99 | 2026-09-15 |
| sera demo ↗ | 70 | 92 | 95 | 89 | 92 | 94 | 2026-10-29 |
| category ↗ | 70 | 92 | 96 | 92 | 92 | 93 | 2026-10-29 |
| home ↗ | 70 | 92 | 94 | 86 | 92 | 94 | 2026-10-29 |
Show this score on your site
A live badge: it always shows Arctos's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/shopify/arctos"><img src="https://themestested.com/badge/shopify/arctos.svg" alt="Arctos speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.