Voltix
Voltix is a Shopify theme by Vowel Web ($350). Tested on 2026-10-17 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 70 for mobile speed and 92 for desktop speed, 92/92 for SEO and 94/95 for accessibility (mobile/desktop, 0–100). Those are medians across its 5 tested presets; mobile speed across every tested page ranges from 65 to 93.
Mobile73

Desktop89

Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 70 | 92 |
| SEO | 92 | 92 |
| Accessibility | 94 | 95 |
| Best practices | 96 | 96 |
Median of 5 presets · measured 36 times since 2026-10-16 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Voltix home page
Mobile
Speed 73 · 27 points to gain
- −22.3 Largest Contentful Paint medium effort
- −2.3 First Contentful Paint medium effort
- −2.2 Speed Index medium effort
- 110 ms Reduce unused JavaScript high effort
SEO 85 · 15 points to gain
- −7.7 Document does not have a meta description low effort
- −7.7 Image elements do not have `[alt]` attributes low effort
Accessibility 92 · 8 points to gain
- −4.7 Image elements do not have `[alt]` attributes low effort
- −3.3 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 89 · 11 points to gain
- −10.3 Largest Contentful Paint medium effort
- −0.8 Speed Index medium effort
SEO 85 · 15 points to gain
- −7.7 Document does not have a meta description low effort
- −7.7 Image elements do not have `[alt]` attributes low effort
Accessibility 92 · 8 points to gain
- −4.5 Image elements do not have `[alt]` attributes low effort
- −3.2 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 | ||||||
| Minimal demo ↗ | 79 | 95 | 94 | 94 | 95 | 95 | 2026-10-16 |
| category ↗ | 93 | 92 | 98 | 97 | 92 | 98 | 2026-10-17 |
| home ↗ | 68 | 100 | 93 | 96 | 100 | 97 | 2026-10-16 |
| product ↗ | 77 | 92 | 90 | 89 | 92 | 90 | 2026-10-16 |
| fresh demo ↗ | 69 | 90 | 94 | 92 | 90 | 95 | 2026-10-16 |
| category ↗ | 68 | 92 | 99 | 98 | 92 | 99 | 2026-10-17 |
| home ↗ | 65 | 85 | 92 | 90 | 85 | 95 | 2026-10-16 |
| product ↗ | 73 | 92 | 91 | 87 | 92 | 91 | 2026-10-17 |
| Scarlet demo ↗ | 70 | 92 | 94 | 86 | 92 | 96 | 2026-10-14 |
| category ↗ | 72 | 92 | 99 | 93 | 92 | 99 | 2026-10-14 |
| home ↗ | 68 | 92 | 97 | 92 | 92 | 97 | 2026-10-14 |
| product ↗ | 70 | 92 | 87 | 74 | 92 | 91 | 2026-10-14 |
| Glamor demo ↗ | 70 | 92 | 92 | 95 | 92 | 94 | 2026-10-14 |
| category ↗ | 67 | 92 | 95 | 93 | 92 | 95 | 2026-10-14 |
| home ↗ | 68 | 92 | 93 | 96 | 92 | 97 | 2026-10-14 |
| product ↗ | 74 | 92 | 87 | 96 | 92 | 91 | 2026-10-14 |
| Voltix default demo ↗ | 75 | 92 | 94 | 90 | 92 | 94 | 2026-10-14 |
| category ↗ | 74 | 92 | 95 | 91 | 92 | 96 | 2026-10-14 |
| home ↗ | 73 | 85 | 92 | 89 | 85 | 92 | 2026-10-14 |
| product ↗ | 77 | 100 | 95 | 90 | 100 | 95 | 2026-10-14 |