Inline ‑ Critical CSS

Name: Inline ‑ Critical CSS
Brand: Speed Boostr
Rating: 3.6 (7 reviews)

Pricing: $10 one-time charge
Rating: 3.6 (7)
Developer: Speed Boostr

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.

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.

Languages

English

Pricing

One-time charge

$10 one-time charge

All charges are billed in USD.

Reviews (7)

Overall rating

3.6

Counts per rating level

86% of ratings are 5 stars
6
0% of ratings are 4 stars
0% of ratings are 3 stars
0% of ratings are 2 stars
14% of ratings are 1 stars
1

All reviews

October 8, 2025

Installation nicht möglich. Man installiert, zahlt und die App verlangt erneut die Gebühr - VORSICHT.

2 Mal die Gebühr bezahlt und geht immer noch nicht.

Habe dem Support beide Rechnungen geschickt, die behaupten, ich hätte nicht bezahlt. shopify bestätigt die beiden Zahlungen, doch den Betreiber interessiert es nicht wirklich anstatt die App frei zu schalten, wurde ein Shopzugriff verlangt nur um mir zu sagen, dass ich angeblich nicht bezahlt habe, genau. Und alle Nachweise wie Rechnungen und so sind ja egal, weil Betreiber meint man hätte nicht bezahlt.

Man kann sicherlich sein Geld auch anders ausgeben, ein Burger wäre hier deutlich effektiver als die App

BLOODY-STREETS.DE

Germany

4 days using the app

Speed Boostr replied October 23, 2025

We’re really sorry to hear about your experience and understand how frustrating this must have been.

To clarify, when an app is installed on Shopify, Shopify itself automatically generates a charge once the merchant accepts the pricing screen. However, if the app is later uninstalled and then reinstalled, Shopify treats it as a new installation, which triggers a new charge.

After reviewing your account history, our logs show multiple installation and uninstallation events, which explains why additional charges appeared. Unfortunately, because the app was uninstalled again, we weren’t able to re-enable your access directly.

That said, we've already processed a full refund for the charge, so you won't be charged for anything.

We truly appreciate you bringing this to our attention and hope you’ll consider giving the app another try in the future. If you decide to reinstall, please contact us directly beforehand — we’ll make sure everything is set up smoothly for you.

Edited November 15, 2025

Great app. Simple to use and seems to be effective.

Home Team Heroes

Finland

3 months using the app

December 31, 2024

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 that? Try the app – you'll see. And then once you experience what we've experienced – continue to periodically rerun the app from time to time, to sort out changes that you make to your store. Possibly the best $10 investment ever!

ExcellentSupply.com

United States

13 days using the app