Monster Cart Upsell+Free Gifts

The app itself is solid and works well once it’s set up. Functionally, it does what it’s meant to do and can be a strong part of a checkout flow. We initially ran into trouble when preparing updates heading into 2026. An issue locked us out of making changes, and early support responses suggested the problem was on our side, even after testing across multiple devices. That was frustrating at the time. That said, after we posted our original review, the owner personally reached out and the experience completely turned around. They acknowledged the issue, made system upgrades, and walked us through the migration step by step. The level of personal attention, accountability, and follow-through was genuinely appreciated. As a business owner myself, I know things happen. What matters is how they’re handled. In this case, the issue was owned, resolved properly, and communicated clearly. Because of that, we’re updating this to a 5-star review. The app is solid, and when support shows up the way it ultimately did, it makes a real difference. Hopefully this becomes the standard experience moving forward.

Great features - So easy to install. Support fixed an integration issue very quickly

Epic app with a brilliant dashboard to understand ROI. Easy interface to use and the customer service is next-level awesome.

absolutely loving this customer service team always so helpful and get the job done right away HIGHLY RECOMMEND!

Great app! Easy to set up and excellent support. Provides a very professional, branded addition to our customer's journey that made us $ from day one! Highly recommended.

Love this app and the founder Ty so much! If I could give 10 stars I would! I had a small issue with my dynamic checkout and Ty jumped in and fixed it right away. I love the ability to offer free gifts and other upsells at checkout. Definitely gets conversions and has increased my AOV massively!! Would highly recommend!

Excellent service, both times I've had questions or issues they were quick to solve it!

Très bonne application avec un support très réactif et compétant !

The app is absolutely fantastic. It's really simple to use and does everything you need it to do. We use the app for all sorts of upsell campaigns and it never fails. Their customer support is also extremely proactive and helpful. Highly recommend this app to anyone looking for a great upsell app.

Amazing customer service. I love it already—subscriber for life.

So far so good! Easy set up and very helpful chat when I needed a little extra help. Let's hope it delivers $$$ !!

Perfect for our brand

The app has exceeded our expectations in every aspect. It's user-friendly and functions exactly as described. Additionally, the support team was exceptionally helpful and responded promptly. Charlene, in particular, provided invaluable assistance with our concerns. We wholeheartedly recommend Monster Cart

Best ATC for boosting mobile conversions. A+++

This app has been so helpful, and the customer service is excellent!

It’s pretty good. Can make a professional design which is highly customisable. Really recommend to anyone who has started making a few sales and needs good upsells. Support also responds quickly, and fixes the issue quickly.

Very good experience so far! I like all the features and the support is very fast and helpful! :)

We have been using this app for some time now, and have seen incredible results with upsells. The conversion rate has improved the most, meaning, customers are finding the app layout super easy to use, so that's a win for us. The customer support team has always been there when you need them too.

Only just started using Monster upsell. The live chat service was extremely fast and helpful. I found it hard to believe that I was speaking to a real person because the response and help was so quick. I have a quick add to cart button on my page and it wasnt showing the monster cart slider when clicked from a collection page so the team are accessing my store to fix that.

Amazing amazing amazing customer service! Fairly speaking, I love the cart, so start to use on my store, some tech issues happened they fixed very fast for me and customer service is just amazing....