Newsletter Kit
Newsletter Kit is a Astro theme by AstroRank (Paid). Tested on 2026-09-13 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 75 for mobile speed and 96 for desktop speed, 100/100 for SEO and 91/91 for accessibility (mobile/desktop, 0–100). Note: its demo home page is heavy — 7.5 MB — heavier than a typical store, so the speed score may understate the theme.
Mobile75
Desktop96
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 75 | 96 |
| SEO | 100 | 100 |
| Accessibility | 91 | 91 |
| Best practices | 96 | 96 |
Single preset · measured 2 times since 2026-09-13 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Newsletter Kit home page
Mobile
Speed 75 · 25 points to gain
- −17 Largest Contentful Paint medium effort
- −4 Speed Index medium effort
- −3.7 First Contentful Paint medium effort
- 450 ms Reduce unused JavaScript high effort
Accessibility 91 · 9 points to gain
- −6.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −2.7 Document does not have a main landmark. medium effort
Best practices 96 · 4 points to gain
- −3.8 Browser errors were logged to the console medium effort
Desktop
Speed 96 · 4 points to gain
- −3.3 Largest Contentful Paint medium effort
- −0.8 First Contentful Paint medium effort
Accessibility 91 · 9 points to gain
- −6.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −2.7 Document does not have a main landmark. 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 | ||||||
| Newsletter Kit default demo ↗ | 75 | 100 | 91 | 96 | 100 | 91 | 2026-09-13 |
| home ↗ | 75 | 100 | 91 | 96 | 100 | 91 | 2026-09-13 |
Show this score on your site
A live badge: it always shows Newsletter Kit's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/astro/newsletter-kit"><img src="https://themestested.com/badge/astro/newsletter-kit.svg" alt="Newsletter Kit speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.