Serein
Serein is a Framer theme by Nzau Ng'emu ($129). Tested on 2026-09-14 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 58 for mobile speed and 91 for desktop speed, 100/100 for SEO and 94/94 for accessibility (mobile/desktop, 0–100).
Mobile58
Desktop91
Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 58 | 91 |
| SEO | 100 | 100 |
| Accessibility | 94 | 94 |
| Best practices | 96 | 96 |
Single preset · measured 2 times since 2026-09-14 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Serein home page
Mobile
Speed 58 · 42 points to gain
- −25 Cumulative Layout Shift medium effort
- −7.3 Largest Contentful Paint medium effort
- −6.7 Speed Index medium effort
- −1.6 First Contentful Paint medium effort
- −1.5 Total Blocking Time medium effort
Accessibility 94 · 6 points to gain
- −4.1 Touch targets do not have sufficient size or spacing. medium effort
- −1.8 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 91 · 9 points to gain
- −5.1 Speed Index medium effort
- −3.8 Largest Contentful Paint medium effort
Accessibility 94 · 6 points to gain
- −4.1 Touch targets do not have sufficient size or spacing. medium effort
- −1.8 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 / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Serein default demo ↗ | 58 | 100 | 94 | 91 | 100 | 94 | 2026-09-14 |
| home ↗ | 58 | 100 | 94 | 91 | 100 | 94 | 2026-09-14 |
Show this score on your site
A live badge: it always shows Serein's current score and links back here. Paste this where the theme is sold or documented.
<a href="https://themestested.com/theme/framer/serein"><img src="https://themestested.com/badge/framer/serein.svg" alt="Serein speed score on Themestested" height="20"></a>
Add ?device=d for the desktop score, or ?metric=seo / ?metric=a11y for SEO or accessibility.