John Zack
john-zack.co.uk
John Zack is a UK-based designer fashion brand offering young, accessible clothing inspired by red carpet and runway trends. The store specializes in dresses, co-ords, jumpsuits, and occasionwear, including a dedicated curve collection, targeting fashion-forward consumers seeking glamorous event and everyday wear.
Products
253
Collections
11
Pages
16
Blog Posts
12
CommerceRank Score
Overall store health assessment based on 5 key factors
74/100
Top Recommendations
- Add a reviews platform to build customer trust
PageSpeed Performance Analysis
Mobile performance from Google PageSpeed • 23 Feb 2026
Overall Ranking
#1692 / 16375
Faster than 90% of stores
Fashion & Clothing Ranking
#346 / 2989
Top 12% in category
Category Avg Performance
57
+17 above avg
Category Avg LCP
1.9s
Faster than avg
Performance
Accessibility
SEO
Core Web Vitals
1.2s
Largest Contentful Paint
0.000
Cumulative Layout Shift
—
Interaction to Next Paint
Additional Metrics
0.7s
First Contentful Paint
391ms
Time to First Byte
3.5s
Speed Index
Store Audit
Actionable insights compared to 4419 Fashion & Clothing stores
#1528 in Fashion & Clothing
Above average (top 35%)
69% below average
253 products vs 819 avg
Faster than 88% of Fashion & Clothing stores
PageSpeed score: 74/100
Category Benchmarks
Compared to 4419 stores in Fashion & Clothing
69% below average
avg
88% below average
avg
61% below average
avg
63% below average
avg
Category Intelligence
How John Zack compares to other fashion & clothing stores
11%
of Fashion & Clothing stores use this theme
6%
of Fashion & Clothing stores use Afterpay
Insights
- 64% of Fashion & Clothing stores offer PayPal
Theme & Design
Tech Stack
Platform
shopify
Payment / Finance
Business Profile
Store maturity and operational indicators
Stable
NaN+ year
Since Invalid Date
Above average catalog size
Top 35% by catalog size
low
Basic content (16 pages)
Tech Stack Maturity
Developing stack
Business Sophistication
Emerging
Store Timeline & History
Feb 2026
Similar Fashion & Clothing Stores
Other fashion & clothing stores with similar size
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About John Zack
John Zack is a fashion & clothing ecommerce store built on shopify and operating in US. The store currently offers 253 products organized across 11 collections, making it comparable in size for the fashion & clothing category.
Theme and Design
John Zack uses the Dawn theme from the Shopify Theme Store. This theme choice is used by 11% of fashion & clothing stores.
Performance Analysis
Based on Google PageSpeed Insights, John Zack achieves a performance score of 74/100 on mobile devices. This moderate score suggests there may be opportunities to improve load times and user experience through optimization. The store also scores 100/100 for accessibility and 100/100 for SEO optimization.
Tech Stack
Beyond the core Shopify platform, John Zack has not implemented a third-party review platform and offers Afterpay for payment flexibility. Compared to other fashion & clothing stores, 64% of fashion & clothing stores offer paypal
Competitive Positioning
Within the Fashion & Clothing category, John Zack ranks #1528 out of 4419 stores we track. This places them in the top 35% of fashion & clothing stores by product catalog size.
Last scanned
Feb 20, 2026
