Monster Cart Upsell+Free Gifts

Warning this does NOT work with product variants. It also does not work with subscription products (i.e., excluding subs from upsells)

Their product says "fully compatible with product variants" but that does not mean it's possible to do a product upsell with a specific variant.

Instead it means that it can apply in the same way to all variants of a product.

I dont write reviews very often, but i had to give feedback from what has been a great experience all round with this app. Not only does it give me a lot more sales and easy to use - but the customer service is the best ive ever encountered. I'd recommend this app to anyone.

I needed some assistance setting up my BFCM Cart, and Live Chat Support came on in seconds and helped me in seconds. Top notch... thank you so much!

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!

I canceled the plugin, but they still charged me on my monthly bill.

I emailed them requesting a refund, but they haven't responded for five days.

I was considering whether to reinstall it in the future, but their attitude has left me disappointed.

Really good customer service, friendly and quick. The app is easy to use and professional, with lots of options for customisation so it blends well with my store. It does exactly what it says it does!

Very helpful customer service, they helped me 2 separate times in 2 days both times they solved the issues in no time at all.
The first was integrating the Shopify cart to monster as the shop cart icon to avoid confusion and the second was helping resolve an issue with my gift tiers. Thanks team!

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.

Angelica Rocks! Helped me like instantly when I couldn't get my cart working. Had a problem for months. Goat.

Great customer service and customizations on various cart types. I've been really happy with the adaptability of the carts/offers and have been able to easily tie the aesthetic in to match my store and product. Encountered some issues integrating with other high-level apps in store, but with the devs help we have been able to navigate through that as well. Thanks Monster Cart team :)