SASO

PageSpeed & Image Optimiser

by Dash Labs SIASEO · #408 in category
Tracking since Dec 3, 2025

Review summary

49 reviews on the listing
3.0★
5 ★
2245%
4 ★
00%
3 ★
36%
2 ★
48%
1 ★
2041%

Last 30 days

2.3★

14 new reviews

▼ 0.7 vs. all-time

Recent reviews

20 most recent
★★★★★AFC Distributing CoUnited States · Oct 10, 2026

Works well and cost effective

★★★★★Wacoal IndiaIndia · Oct 9, 2026

Customer support is the worst. I have been trying to reach out to customer support for the past two months, but there has been no response. I have never experienced this kind of careless support from any app. I am facing cache issues, some functions are not working on some devices, and some features are visible on some devices but not on others.

★★★★★PlatanomelónSpain · Sep 28, 2026

The app stopped working 3 weeks ago, blank screen. Cleared cookies, cache and even changed browser and still does not work. Tried in a different store and and it works just fine. So the issue is only in our store... Being reaching Clauma support via e-mail and via Shopify form and no answer for 3 weeks already, the app used to work fine but the issue and the lack support will make me delete it. Would not recommend right now. UPDATE: After some months it seems that support has reappeared and the app has being updated. It now works as expected.

★★★★★Armstrong CheshireUnited Kingdom · Sep 28, 2026

From what i can see, I think it's made a positive difference. An improvement to the App would be to more visibly show the before and after in terms of speed text.

★★★★★ORANGE AMOURFrance · Sep 28, 2026

Aujourd'hui la vitesse Shopify est de 43 comme avant d'installer l'application tout comme sur pagespeed insights.

★★★★★Riderbag Reflective Bike Commuter & Motorcycle BackpacksUnited States · Sep 28, 2026

Unable to reach anyone. App not working. The comparison page speed does not load at all. Tried emailing 3 times no response. Also if you have something like Pagefly, it will cause issues.

★★★★★Throne Boss AustraliaAustralia · Sep 28, 2026

App seemed to be doing a great job, then about 2-4 weeks ago the page speed dropped. I've tried three times to contact support, but no one has gotten back to me.

★★★★★Anbu Clothing BrandSerbia · Sep 28, 2026

Very expensive and misleading, money pit. It does what they say, but at an unreasonable and unexpected price, way above $19.90 they advertise. Also, they raised their base prices without warning, when I installed, the base price was $9.90

★★★★★Moehair USA Inc.United States · Sep 28, 2026

The app has been incredibly helpful for me. Marc was really supportive, and I highly recommend this app to everyone. Every single penny spent is worth it.

★★★★★mangoalChina · Sep 28, 2026

Best speed optimizer app, they provide good customer service when you encounter the problem they deserve the 5 star

★★★★★VacationGrabsUnited States · Sep 28, 2026

This developer doesn't respond to questions on slack or email. I need technical help and I have questions about usage fees. I've had the app for a little over a week now and my website speed hasn't improved. I will be cancelling this subscription before I'm hit with more usage fees.

★★★★★PRINT EXPLOREGreece · Sep 28, 2026

"I'm extremely frustrated with Flash Speed Optimizer. As a paid subscriber, I expected my store to be fully optimized, but there's still a 30% unoptimized score on mobile. This is a serious issue since most of my visitors come from mobile, and it's directly impacting my business negatively. Despite multiple emails and chat messages, I've received zero response. This level of neglect is unacceptable. I demand immediate action to optimize my store and compensation for the damage done to my business due to their inaction. Do not trust this app if you value your business!"

★★★★★Sicilus SrlItaly · Sep 28, 2026

I have attempted to contact support repeatedly via both chat and email for several days, with no response. This level of disregard for customers is unacceptable, especially for an app that handles crucial aspects of an online store. While the app may have potential, the complete lack of support makes it unreliable for professional use. I would advise developers to drastically improve their customer service if they want to be taken seriously in the Shopify market. Unless you are willing to troubleshoot every issue yourself, I suggest looking for alternatives with more responsive customer support.

★★★★★Photo Memory Bracelet LLCUnited States · Sep 28, 2026

Terrible support, due to no support, removed the app and it left code in the site that broke features in my store. Had Shopify support involved with the issue and they responded several days later "we refunded the customer" leaving no regard to get the code removed from my website.

★★★★★healthcare nt sickcareIndia · Sep 5, 2026

The Flash PageSpeed Optimization app is a game-changer for my Shopify store to optimizing external URLs! The app is user-friendly and easy to navigate. I was also impressed by the excellent customer support provided by Marc. He was patient, knowledgeable, and went above and beyond to address all my concerns. Thanks to the app and the support, my website is now faster than ever before, providing a better user experience for my customers. I highly recommend this app to anyone looking to improve their website's performance.

★★★★★Keelin DesignBelgium · Sep 5, 2026

This app is AMAZING!! My website speed is so much better now according to Google PageSpeed Insights. Even on mobile it loads very fast (I used to be in the red zone all of the time, even with the use of other page speed booster apps). Now I only use this app and I'm very happy with the results. Thank you for doing such an amazing job!

★★★★★STREETMODE ™Germany · Sep 5, 2026

This is a total rip-off! They billed my account with an excessive amount. streetmodestore.com Don't argue with them about this, otherwise they will cleverly bill you.

★★★★★bundeswehr-ausrüstungGermany · Sep 5, 2026

Altdaten im Quellcode nach löschen der App. Das führte zu verschiedenen Shop Fehler. Es wurde unteranderem kein Favicon mehr angezeigt und andere Apps wurde im Hintergrund blockiert (z.b. Klaviyo). Damit ist man praktisch gezwungen, die App dauerhaft zu nutzen, weil es sonst zu Problemen im Shop kommt.

★★★★★Dr Vaidya'sIndia · Sep 5, 2026

Though the app is good, i would like to point out that the support is equally bad. they dont bother to reply on emails or on chat. I had a query which is still unanswered for a year.

★★★★★USA AptekaUnited States · Aug 23, 2026

I am surprised to read bad reviews. They are doing pretty good job making a speed of my store in a good range and I have got support very quickly. Thank you !

Review locations

Top countries by review count
United States
1837.5%
Germany
510.4%
India
48.3%
Italy
36.3%
Finland
36.3%
France
24.2%
China
12.1%
Serbia
12.1%
Lithuania
12.1%
Sweden
12.1%