Reviews (648)

Overall rating
4.8
Counts per rating level
  • 94% of ratings are 5 stars
  • 3% of ratings are 4 stars
  • 1% of ratings are 3 stars
  • 0% of ratings are 2 stars
  • 2% of ratings are 1 stars
What merchants think

Feedback submitted

Merchants highly praise this app for boosting conversion rates and average order values through effective upselling and free gifts. They appreciate its engaging shopping cart enhancements and multifunctionality, reducing the need for additional apps. Features like sticky carts and urgency text are standout elements. The app's integration with Shopify is seamless, and its customer support is responsive, often customizing the app to meet specific needs within 24 hours.

February 8, 2025

We're looking at switching apps. This cart plugin has given away way too much for free to our customers. For example, if we have discount codes created in shopify and we have our monster cart setup to give a free gift if you spend $79, it's calculating the RRP and then giving the free item (worth $35) even after the client has used a 40% off code which brings their ACTUAL cart total down to $47. ...

The Bod Society
Australia
7 months using the app
December 18, 2024

I wanted to test the app during the Black Friday promo : one month free trial. I've been charged after 10 days. I've contacted the support several times, nobody follows up on my several emails, and nobody is answering since I've asked for a refund. Unacceptable.

La vie quoi
Germany
28 days using the app
Monster Apps replied December 19, 2024

Legend! Ty here - one of the founders... I tried shooting you an email! OFC we refunded the second we could see it on our end 😁 Would be silly if we didn't. Unfortunately - ...

October 30, 2024

A lot of glitches are there, and when you contact the customer care their response is really pathetic. You have to wait for 24 hour in order to get a proper response from the dev team. Considering the app cost I won't recommend this app to anyone else

Blue Tyga
India
2 months using the app
Monster Apps replied October 31, 2024

Sorry we aren't compatible with the checkout system you wanted to use and this messed with your analytics. Unfortunately, this is a limitation Shopify puts on us.
I can see ...

April 19, 2024

this entire app does not work
super hard to customize
my customers click add to cart and it takes them to the homepage
then the add to cart pops up
then when you try and click the terrible looking upsell
it doesnt even work
support isnt online during normal USA working hours

I heard great things about this platform but overall experience has been terrible. I get things happen with these apps but ...

Retro Revive
United States
8 days using the app
Monster Apps replied April 22, 2024

Hi team 🥰 Our app has integrated seamlessly with 4000+ stores out of the box - However your specific theme is a rare one we have to work on manually. Looking through records ...

November 30, 2023

This is the worst app! It was recommended by a team that's helping me with the website, the cart was changed to this one before Black Friday, the app works for certain people but for others don't. We got complaints from clients that couldn't add items to cart and when we test some of us could, some of us couldn't and this happened in the busiest time of the year. DO NOT USE!

Tucketts™
United States
11 months using the app
Monster Apps replied December 2, 2023

Sorry to hear this!!!! 😅 We were in 1000% help mode throughout this period to help with any theme, App incompatibility or cart issues anyone might have. Looking back i couldn ...

August 15, 2022

So stupid, the worst app. thief app. "This campaign will show up on the products you choose below. you can show it on all products or specific"
The campaign will be triggered by sitewide products, not a specified collection or product. The discount will be applied to all products, not specified collections or products.

FIRM ABS
China
4 months using the app
Monster Apps replied August 16, 2022

As per chat desk discussion: You were using the app incorrectly. 😅 We have 1800+ stores making great upsell $$$ without a problem. The campaign chosen was a sitewide offer ...

Edited May 12, 2022

This app takes 52% of speed from your website. Before installing this app our Mobile Site Speed Score was 91 and now with the Cart Upsell Monster app our Mobile Site Speed Score is 47. Do not recomend this app!!!

Scandinavian Goods
Finland
About 1 month using the app
Monster Apps replied May 12, 2022

UPDATE: We are currently beta testing the lightning speed update RIGHT NOW! Reach out if you want to be in the beta tests. 💃⚡️
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Hi team, We're very sorry to hear this. ...

August 22, 2022

Unfortunately this app broke my website for all Safari users, which is the majority of my clients. I've been paying a lot of money in marketing while my clients are not able to do checkouts

Holee Jewelry
United States
11 days using the app
Monster Apps replied August 22, 2022

We have 1000's of stores using Monster seamlessly on all browsers and 100's of themes. I see you never reached out to the support team for help 😢. Sorry to hear this is your ...

April 7, 2023

Worst support we've received from any app provider over the past five years we've been on Shopify. The app was breaking our 'Add to Cart' button so that when it was clicked, nothing would happen. It would take quite a few clicks at times to add an item to the cart, and even then our old cart would load, not the MonsterUpsell version.

I sent a screen sharing video to support regarding the issue, ...

SupplyMe
United States
3 days using the app
Monster Apps replied April 7, 2023

Ty here one of the founders... 🥲🥲 Store owners are the heart of our business and the team works hard to support as best they can... (see past reviews)
Trust me - it kills us ...

October 25, 2023

This app totally messed up my currency. 60 USD product was in cart for 2000 USD!!! also it is slowing my website a lot!!! If there would be an option to give 0 stars that is what I would choose!!!

EXHAUSTIFY.
Czechia
1 day using the app
Monster Apps replied October 29, 2023

Sorry to hear this. It's extremely rare for this currency issue to have happen as we use shopify best practices. It would most likely have been due to a conflict with another ...