Observer
Observer is a Ghost theme by trexthemes ($149). Tested on 2026-11-07 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 72 for mobile speed and 85 for desktop speed, 100/100 for SEO and 96/96 for accessibility (mobile/desktop, 0–100).
Mobile72
Desktop85
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 72 | 85 |
| SEO | 100 | 100 |
| Accessibility | 96 | 96 |
| Best practices | 96 | 96 |
Single preset · measured 8 times since 2026-10-09 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Observer home page
Mobile
Speed 72 · 28 points to gain
- −25 Largest Contentful Paint medium effort
- −2.1 Speed Index medium effort
- −0.7 First Contentful Paint medium effort
- 990 ms Reduce unused JavaScript high effort
Accessibility 96 · 4 points to gain
- −3.9 Background and foreground colors do not have a sufficient contrast ratio. medium effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Desktop
Speed 85 · 15 points to gain
- −14 Largest Contentful Paint medium effort
- −0.5 Speed Index medium effort
- 200 ms Reduce unused JavaScript high effort
Accessibility 96 · 4 points to gain
- −3.9 Background and foreground colors do not have a sufficient contrast ratio. medium effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Observer default demo ↗ | 72 | 100 | 96 | 85 | 100 | 96 | 2026-11-07 |
| home ↗ | 72 | 100 | 96 | 85 | 100 | 96 | 2026-11-07 |
Show this score on your site
A live badge: it always shows Observer's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/ghost/observer"><img src="https://themestested.com/badge/ghost/observer.svg" alt="Observer speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.