EcomAppReviews

Shopify app

Emerging

Inline ‑ Critical CSS

Speed up your online store by generating critical css

Rating on Shopify
3.7(8)
Reviews
8
Developer
Speed Boostr
Launched
March 29, 2021
Pricing
$10 one-time charge
Languages
English

View on the Shopify App Store

The facts

Every value below is read from the listing or computed by the published formula. Nothing is a verdict.

Rank in SEO

#23 of 41

See the ranked table

Bayesian rating

3.87

category median 4.14

Reviews in the last 180 days

0

from the 3 reviews on the listing page

1 and 2 star share

25%

2 of 8

Starting price

$10/one-time charge

band: $10 to $29

Pricing plans as listed on Shopify

All charges are billed in USD.

PlanPriceBilled yearlyTrialUsage feeIncluded
One-time charge$10 one-time chargenot offerednonenone statednot listed

Rating distribution

8 ratings on the listing at crawl time.

  • 5 stars6(75%)
  • 4 stars0(0%)
  • 3 stars0(0%)
  • 2 stars0(0%)
  • 1 star2(25%)

Latest reviews

The 3 most recent of 3 on-page reviews, quoted to at most 25 words each. Full reviews are on the Shopify listing.

  • 5 starsDec 31, 2024ExcellentSupply.comUnited States13 days using the app

    "KRAZY! That's all I can say. What a totally brilliant app. For a measly $10 our Pagespeed score went up >25%. How can you beat ..."

    Read on Shopify

  • 5 starsAug 23, 2021Skatewarehouse.co.ukUnited Kingdom3 days using the app

    ""Instant pagespeed increase for $10... yeah right?!" That's exactly what I said when I saw this app but thought I'd give it a go anyway ..."

    Read on Shopify

  • 5 starsAug 4, 2021NatureCityUnited StatesAbout 20 hours using the app

    "One day since install opinion: This helps us stream line our CSS and in conjunction with some other fixes we were able to get our ..."

    Read on Shopify

Screenshots

5 of 6 listing screenshots, composed as review cards. Captions are the developer's own.

  • Inline ‑ Critical CSS Shopify app screenshot: Inline your critical CSS
    1 of 5: Inline your critical CSS
  • Inline ‑ Critical CSS Shopify app screenshot: Critical CSS inlining for faster page rendering
    2 of 5: Critical CSS inlining for faster page rendering
  • Inline ‑ Critical CSS Shopify app screenshot: UI for generating and restoring critical CSS in Shopify
    3 of 5: UI for generating and restoring critical CSS in Shopify
  • Inline ‑ Critical CSS Shopify app screenshot: LCP performance improvement showing faster page load times
    4 of 5: LCP performance improvement showing faster page load times
  • Inline ‑ Critical CSS Shopify app screenshot: LCP performance improvement showing faster page load times
    5 of 5: LCP performance improvement showing faster page load times

Features Shopify lists for this app

Feature handles from the listing, grouped as Shopify groups them.

SEO tools

  • Content optimization

Monitoring performance

  • Analytics
  • Speed analysis
  • Testing

Data access

As disclosed on the listing. Never scored.

Not disclosed on the listing.

Developer

Speed Boostr

Apps in the dataset:
3
Address:
366 Main Street, Suite 946, Conyngham, PA, 18219, US
Website:
not stated
Support email domain:
previewx.zendesk.com
English support:
yes
Resources:
Privacy policy

Similar apps

Shopify's own similar-apps list first, then apps in the same category that share the most feature handles.

From the Shopify listingDeveloper claims, shown verbatim and collapsed. 75 words.Show
  • Your website will load faster, especially for first time users.
  • A faster load time will increase your conversation rate.
  • Rank higher in Google with a faster loading site.

Inline your Critical CSS to eliminate render-blocking resources. This will speed up your store.

With Critical CSS, the visitor gets the base styling as quickly as possible; because it’s right there in a <style> element in the document’s <head>, there’s: no extra request to the server for the stylesheet & no waiting for the requested styles to load in and render.

The below-the-fold, or non-critical, styling is then loaded in the background to avoid render-blocking.

Data as of Oct 15, 2026, from the public Shopify App Store listing. How the numbers are computed: methodology.

8 reviews counted on the listing. Rating and count in the structured data are the values Shopify displayed at crawl time.