Monster CartUpsell — Free Gift

We've used Monster Cart Upsell for several years now and it works well. Their customer support is also very quick to respond. Their live chat isn't always available, but if you start a chat they will email you back pretty quick. I've also given them access to my online store several times and they're able to fix issues for me. 5/5 stars!

Solid app, great customer support. I found and reported a bug which the team promptly fixed within 48 hours.

The guys are MonsterCart are super helpful from the get go.

Super easy to set up and use. I was able to message them on a Sunday and get the ball rolling to fix an issue.

That’s a wonderful app. I’ve seen other apps that are not as fast and are very heavy to run. This one is amazing, especially because of the kind of support they provide.

At BauUniverso™, we move fast — and so do they! I had a technical issue on my store that needed urgent attention. The MonsterApps team jumped in immediately, diagnosed the problem, and fixed it in just a few hours. Not only did they solve the main issue, but they also double-checked that all colors, sizes, and features were perfectly updated and running smoothly. Their communication was crystal clear, fast, and human — something you don’t often find in tech support. In an industry where delays are common, MonsterApps stands out for their speed, skill, and genuine care for their clients. They didn’t just meet expectations — they went beyond. Highly recommend them to anyone who values reliable, proactive, and high-quality support. Thanks again, MonsterApps — I’ll be recommending you every chance I get! — Founder & CEO — BauUniverso™

Nice app the support replies very fast aswell

Probably the most prompt and thorough app support I've ever received.

Charlene was very helpful and easy to chat with. Made my experience with Monster Cart seamless, highly recommend.

Angelica, was very helpful and fast reponding. Nice support!

I can’t recommend the Monster Checkout Cart app enough! It’s incredibly customizable, easy to use, and integrates seamlessly with my Shopify store. What really sets it apart is the customer service — they respond so quickly and go above and beyond to help with any questions or tweaks I need. I love how flexible the app is, and it has made a huge difference for my store’s checkout experience. Truly impressed and very happy with both the app and the support team!

Very quick and responsive. I really enjoy working with them and their support staff.

The Monstercart upsell app looks amazing. I'm currently still going through setup, and have had an incredible experience with support helping me through some of my initial setup already.

Excellent experience with customer service team (Angelica in particular). Responses are always prompt and they've been very helpful in getting the cart to show on our site!

This app has great features and the best customer service I have ever experienced! Super fast replies and they always go above and beyond to solve any problems.

friendly customer support and great app

Great app great customer service have been using for years never looking back

great customer service

This app works well for computers but it makes looking at the store on a phone to busy and it takes up too much real estate. Customers found it confusing on their phones.