Monk
Monk is a Shopify theme by Slash Themes ($300). Tested on 2026-09-13 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 76 for mobile speed and 95 for desktop speed, 97/97 for SEO and 95/93 for accessibility (mobile/desktop, 0–100). Those are medians across its 3 tested presets; mobile speed across every tested page ranges from 62 to 94. On its marketplace it is rated 5.0 out of 5 from 26 reviews.
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 76 | 95 |
| SEO | 97 | 97 |
| Accessibility | 95 | 93 |
| Best practices | 88 | 88 |
Median of 3 presets · measured 18 times since 2026-09-11 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Sea home page
Mobile
Speed 71 · 29 points to gain
- −24 Largest Contentful Paint medium effort
- −2.9 First Contentful Paint medium effort
- −2.2 Speed Index medium effort
- 210 ms Reduce unused JavaScript high effort
SEO 92 · 8 points to gain
- −7.7 Image elements do not have `[alt]` attributes low effort
Accessibility 91 · 9 points to gain
- −4.7 Image elements do not have `[alt]` attributes low effort
- −4.7 Form elements do not have associated labels medium effort
Best practices 73 · 27 points to gain
- −19.2 Uses third-party cookies high effort
- −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 81 · 19 points to gain
- −10.3 Largest Contentful Paint medium effort
- −6.6 Total Blocking Time medium effort
- −1.6 Speed Index medium effort
SEO 92 · 8 points to gain
- −7.7 Image elements do not have `[alt]` attributes low effort
Accessibility 91 · 9 points to gain
- −4.7 Image elements do not have `[alt]` attributes low effort
- −4.7 Form elements do not have associated labels medium effort
Best practices 73 · 27 points to gain
- −19.2 Uses third-party cookies high effort
- −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 | ||||||
| Sea default demo ↗ | 76 | 97 | 95 | 90 | 97 | 93 | 2026-09-11 |
| category ↗ | 85 | 100 | 100 | 96 | 100 | 95 | 2026-09-12 |
| home ↗ | 71 | 92 | 91 | 81 | 92 | 91 | 2026-09-11 |
| product ↗ | 73 | 100 | 95 | 93 | 100 | 92 | 2026-09-12 |
| Restore demo ↗ | 79 | 97 | 95 | 95 | 97 | 92 | 2026-09-12 |
| category ↗ | 94 | 100 | 100 | 94 | 100 | 95 | 2026-09-12 |
| home ↗ | 75 | 92 | 90 | 97 | 92 | 90 | 2026-09-13 |
| product ↗ | 67 | 100 | 95 | 95 | 100 | 92 | 2026-09-12 |
| Monk demo ↗ | 75 | 97 | 97 | 97 | 97 | 95 | 2026-09-12 |
| category ↗ | 94 | 100 | 100 | 94 | 100 | 95 | 2026-09-12 |
| home ↗ | 70 | 92 | 96 | 99 | 92 | 97 | 2026-09-13 |
| product ↗ | 62 | 100 | 95 | 99 | 100 | 92 | 2026-09-12 |
Show this score on your site
A live badge: it always shows Monk's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/shopify/monk"><img src="https://themestested.com/badge/shopify/monk.svg" alt="Monk speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.