Inline ‑ Critical CSS for Shopify

Inline ‑ Critical CSS

Speed up your online store by generating critical css
SEO
Developer
Speed Boostr
View on App Store
Inline ‑ Critical CSS
Rating
3.6
Feedback
8
Reviews
Chart
#6,856
Shopify
Reviews over time
New reviews per month across the app's lifetime.
App ranking
Overall position in the Shopify App Store.
Reviews summary

The reviews for this Shopify App are mostly positive, highlighting its effectiveness in improving site speed and ease of use. Users have reported significant increases in page speed scores and quick loading times after installing the app. The customer service is also praised for being responsive and helpful. However, there is one negative review mentioning issues with installation and payment. The user had trouble getting the app to work despite paying twice and providing proof of payment.

Time spent using app
How long merchants keep the app installed.
Less than an hour 12%
Less than a day 12%
Less than a month 62%
Less than a year 12%
More than a year 0%
All reviews
5 / 5 Share
Nov. 15, 2025

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

Store Using app Total reviews Average rating
Home Team Heroes 3 months 4 2.3
Developer Reply

Thank you so much for your 5-star review! We're glad to hear you find the app simple to use and effective. We really appreciate your support!

1 / 5 Share
Oct. 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

Store Using app Total reviews Average rating
BLOODY-STREETS.DE 4 days 13 4.7
Developer Reply

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.

5 / 5 Share
Dec. 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!

Store Using app Total reviews Average rating
ExcellentSupply.com 13 days 67 4.3
1 / 5 Share
Feb. 24, 2023

Not working . No answer at support . .

Store Using app Total reviews Average rating
Fashionfitz 11 days 8 5.0
5 / 5 Share
Dec. 5, 2021

The app does a more measurable progress on mobile download speed increasing First Contentful Paint which was around 3.4 s on a collection page, now app installed it is about 1.3 s. Overall our Google Pagespeed score increased around 5 - 8 points for the same collection page.

Store Using app Total reviews Average rating
Cymbal House 22 minutes 34 4.2

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