Monster Cart Upsell+ Free Gift

This app was great until I saw that they were charging me more than double what I agreed to. I want all of my money I have ever given over what I agreed to (14.99) refunded. I just coded my own version of this app and it is way better.

Fantastic - support is so helpful and cart is easy to set up and manage. I use it for bundles and one tick upsells. HIGHLY RECOMMEND

Great app and very responsive support, we recommend!

Really helpful and quick customer service. They were happy to go out of their way to help check the settings were correct when I had campaigns running in several different countries and run an IP address for me to view the different countries. Only took a few minutes for them to confirm everything and send me screenshots

great help

Just installed today and love it so far! Customer service has been 11/10!

Thank you Angelica for promptly helping me with our query

Works like a charm and their support is the best!

Really happy with Monster Cart so far. It’s easy to set up, highly customizable, and gives us a lot of flexibility with upsells, free gifts, and cart offers without making the experience feel cluttered. Everything works smoothly with our store and it’s been a great tool for improving the cart experience and increasing AOV. Definitely recommend it!

Helped resolve 2 of our cart issues: adding a custom message for those who add multiple subscriptions, and when the cart suddenly stopped working when adding the first item on our new landing pages.

Great app, works well and the team are very helpful if things are not working quite right. Helped diagnose an issue that affected checkout that wasn't a Monster Cart issue.

love working with monster! theyre the best and have a super responsive CS team!

Incredible support from the Monster Upsell team. They go above and beyond to customise our cart and ensure we are happy with the overall features and functions.

Great, easy to use app for upsells. We use the functionality to offer free gifts when customers hit a certain order threshold. When I run into issues, the customer support team is swift to answer and action. 5 stars!

WHAT AN APP! So useful and you can instantly see the benefits from an upselling perspective. What is so great is that the team are constantly upgrading and thinking of new methods and ideas to boost your revenue on the cart. The customer support is truly exceptional, even getting replies to chats on Sunday and the team are also open to implementing ideas if good, so one of ours is even on the roadmap thanks to the founder agreeing it is good. Wish all Apps had such great service in addition to a top product! HIGHLY RECOMMENDED!

Terrible app. I was a client for quite a while and wish I had tapped out sooner. We experienced multiple bugs and glitches that the team repeatedly approached with bandaid fixes, only for the same problems to return soon after. These issues ended up costing us a significant amount in lost sales, as many of them directly affected the cart, including items duplicating in quantity or the cart freezing. We also found that these issues were causing our ATC events to be overcounted, which had a significant impact on the data being carried over to our advertising platforms. The last straw was when the issue happened AGAIN, except this time the cart quantity was not only duplicating, but tripling after selecting ATC just once across our products. We had a sale running at the time, and customer service told us we would need to wait 12–24 hours for their devs to "look into it". We simply could not afford to wait that long, especially when this same issue had already returned multiple times. By the time they got back to me, I had already switched over to a much more reliable cart app. Their proposed fix was that they now had a new V2 version of the app and recommended that I install that instead. Fantastic. That was the solution after the bug had already returned multiple times and impacted our conversions for who knows how long. We also received complaints directly from customers about issues with the cart, so this feedback was not isolated to what we were seeing internally. What further confirmed the issue for us was that only a few days after switching cart apps, our ATC rate normalised despite similar traffic volume, and our conversion rate improved significantly. We are a 7-figure brand, and I am confident in saying that we potentially lost thousands of dollars in sales from the same issue occurring without us even knowing. I am just glad our customers were there to point out the cart issues when they happened. Terrible app. I was a client for over a year and wish I had tapped out sooner. We experienced multiple bugs and glitches that the team repeatedly approached with bandaid fixes, only for the same problems to return soon after. These issues ended up costing us a significant amount in lost sales, as many of them directly affected the cart, including items duplicating in quantity or the cart freezing. We also found that these issues were causing our Add to Cart events to be overcounted, which had a significant impact on the data being carried over to our advertising platforms. The last straw was when the issue happened again, except this time the cart quantity was not only duplicating, but tripling after selecting Add to Cart just once across our products. We had a sale running at the time, and customer service told us we would need to wait 12–24 hours for the team to fix it. We simply could not afford to wait that long, especially when this same issue had already returned multiple times. By the time they got back to me, I had already switched over to a much more reliable cart app. Their proposed fix was that they now had a new V2 version of the app and recommended that I install that instead. Fantastic. That was the solution after the bug had already returned multiple times and impacted our conversions. We also received complaints directly from customers about issues with the cart, so this feedback was not isolated to what we were seeing internally. What further confirmed the issue for us was that only a few days after switching cart apps, our Add to Cart rate normalised despite similar traffic, and our conversion rate improved significantly. We are a seven-figure brand, and I am confident in saying that we potentially lost thousands of dollars in sales from the same issue occurring without us even knowing. I am just glad our customers were there to point out the cart issues when they happened, otherwise we may not have known the extent of the problem. This app sounded affordable at first, but the issues it caused ultimately cost us far more than we ever saved by using it.

Been using for about 4 months, many bugs and errors that lead to abandoned carts. Error when using several currencies. Poor support, quick but not very helpful.

The app itself is amazing but the customer service is next level! Ty for the help! looking forward to using this app for a long time to come!

Fast and helpful support! I reached out to the support team and got a quick response, they helped me smoothly. Very complete app for managing upsells, free gifts, and cart discount thresholds — recommended for anyone looking to increase their store's AOV

great service

great service

Unfortunately, I’m very disappointed with both the Monster Cart app and the customer service. The app is marketed as an upsell solution, but it does not support true tiered upsells. For example, we wanted to offer one upsell when a customer adds a product to the cart, and then unlock an additional offer when they add the first upsell. This type of tiered setup is not possible, which was a major limitation for us. Customer service has also been frustrating. Response times are too long, and it often feels like a different person is handling the conversation each time. Instead of getting a clear solution, I frequently receive another question and have to explain the issue again. Overall, I’m not satisfied with either the functionality of the app or the level of customer support.

Updating my review as it's only fair. We did have an issue with our billing, but Ty has since reached out personally, resolved it, and genuinely went above and beyond to help. He stayed in touch throughout the process, explained everything clearly, and the customer service has been excellent. We're still using the app and it's been working well for us. Thanks again, Ty, for all your help! Original review - Decent app, but picked up that they are duplicating their charges every month. They charge a monthly fee + usage & a monthly fee again. I reached out to their support 2 weeks ago and keep getting a general response that they've passed on the message to the team leader, but still no response. Can you please refund and fix your charges ASAP? Check your charges on your monthly bill!

I had an issue and reached out to the support team. They replied incredibly fast and were so helpful and supportive. Highly recommend this app!!!

Amazing customer service — TY has been super helpful! Love how flexible the customisation is across different cart types. We had a few hiccups with integration, but the dev team helped us sort it out quickly.

Great app for cart upsell offers — exactly what I needed for my store. The support team resolved my issue perfectly, the only thing they could improve is their response time. Highly recommend!

Very happy to give the support team a 5 star review! I was going live with a promotion and I noticed the night before the drop downs were not working as I just upgraded to V2 of the app. The team were straight onto it and resolved it quickly. Always super helpful even when the customer (i.e. me) was in panic mode. Thank you!!

Really great customer service with prompt replies and quick actionable solutions. Great app overall!

Excellent app and service above expectations. Fast, friendly help and always gets a solution to any question or problem. We have been using this app since March 2023. Highly recommended!

amazing app that converts, great and speedy customer service

Good app, Have definitely noticed an increase in AOV with the progress bar integrated into the checkout

App is blocking the zoom feature on my store from working on mobile. I found this out by disabling all app embeds and restoring them one by one, testing the zoom feature each time. When I enabled this app, the zoom feature went away again. Reached out to customer service and that was useless. Decided to uninstall the app and found a free alternative while searching.

I just downloaded this app, actually started with another one but then swithced to this one becuase this one had more and better features such as the sticky add to cart combined with everything else. Had some issues setting it up but the support has been really quick and so far managed to solve everything I have asked for :) very satisfied!

I am very new to Monster Cart but over the last 2 weeks have needed help and clarification on a number of issues during a Mothers Day campaign. The response time was very quick and the advice was clear and concise making it very easy to implement the updates on my website. I feel confident that i can navigate the cart myself without relying on others to assist me in the future. Highly recommend them!

Great customer service, quick and very helpful! Highly recommedn the Monster Cart for flexablity of cart options.

Super helpful service with any issues

I had some issues initially and Ty has been amazing at helping me fix everything personally. He has spent so much time trying to make it right and I now have everything set up on my store and am so excited to use all the features available. Absolutely amazing customer service and app! Cart features and campaigns are easy to set up and look amazing.

Very good and friendly service.

I've been using this app for over 3 years and honestly is so good and easy to use. service is amazing and a lot of things they have taken upon themselves to help and edit on behalf of me when i dont understand the steps.

I really appreciate the support from the Monster Cart team. They were amazing and helped me resolve an issue that was actually caused by another app affecting my cart. Their response time was excellent, and they went above and beyond their own app to identify the problem and help fix it. Truly impressive service, thank you so much!

Really appreciate the support from the MonsterCart team! They’ve been attentive and proactive in helping us resolve the issues. They’ve also been consistently going back and forth with their team to find solutions. Well done team!

Amazing customer service. I just had a quick question and the team responded very quickly, they even jumped on my website to see if the app was running smoothly and flagged a few things I hadn't pick up on. I installed the app and saw and increase in AOV within the hour! 10/10

I've seen great AOV results historically using the Monster cart. I recently had an issue with billing and upgrading onto the V2 version (which offers a much faster cart), but I can say that Ty the founder is a class act and looked after me personally until the issue was fully resolved. I look forward to using Monster for the foreseeable and adding $$$ to my average order value. Cheers team.

A very kind girl helped me immediately, the service is truly professional. Charlene was helpful and very friendly.

I've had assistance with 2 completely different things now and both times the service has been great, with quick fixes.

The girls behind this app are so supportive, knowledgeable and kind. They have been a help, and answer any question so quickly. Thank you so much!

Incredibly fast, responsive, and helpful customer service!! I had an issue with a product photo carousel in the slide-out cart on my website, and I contacted Monster Cart’s customer service. Their team got back to me within 10 minutes, requested access to my store, and sorted out the problem instantly. Absolutely fantastic!

Doesn't attribute sales. Meaning I have no idea if the app is driving any value. 'just trust me bro' is a bad value proposition

The discount calculation is weird and shows up differently in check out. I had so many customers asking. The App has lots of bugs and a very bad support. I moved to Unicorn Cart eventually.

Great app! Support is fantastic! Solved all our questions

I LOVE LOVE LOVE!!! MonsterApps/Cart and have been using it for the past two years. I highly recommend. I just upgraded to version 2 and know I will love it even more. Their tech support is amazing 10/10 so shout out to them. If you have been considering, wait no further and download them today!!!

Awesome app I think this really helped smooth out the checkout experience and upsell for sure! One of the best apps I have and definitely worth it!

I would rate this 10 stars if I could. This is by far the strongest cart upsell app on Shopify right now. Since implementing it, I have doubled my AOV, and it includes every feature you could need in a serious upsell tool. For a while I was torn between OCU and Monster Cart, but with their latest updates, Monster Cart clearly wins across the board. Customer support has also been excellent. Fast, reliable, and at one point I even had one of the founders, Ty, personally assisting me. 100/10. If you are looking for an upsell app that genuinely lifts AOV, this is the one to use.

Had an issue with shipprotect checkout and Angelica from the support team handled it with ease. The issue was resolved quickly.

Really helpful chap (Ty). Resolved my issue straight away and showed me how to fix similar issues if I need to next time! :) Super speedy service, took no more than 5 mins from start to finish.

Ty, the owner, is exceptional and amazing. He is very reliable and will help you with any questions or solutions you need. You will not regret MonsterCart. They are the best, and they also have an excellent support team.

Great app! Support is even better! Very responsive and keep me updated if fix needs more time.

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 took care of my double cart issue in no time, which had given me a problem for the longest time! Great support!!!

Easy to use, never glitches or never had any problems. Customer service is quick & real humans which is great (Shout out to Angelica for going above & beyond.)

I'm really not so tech savvy, but that's not a problem! The Team at Monster Cart, especially my new best buddy Charlene, was there to help me create a cart that was tailored for my e-commerce site to increase my Average Order Value. It was everything I was looking and hoping for in a tool to help me with my business. Thank you Monster Cart!

Really great app, and the customer service has been phenomenal - reached out to customer service with an issue and had everything fixed within 10 minutes.

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.

MonsterCart is a really great app! We've tried a fair few similar apps, but have always come back to MonsterCart as the interface is easy yet powerful to use! The customer service is above & beyond, super helpful.

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.

Outstanding customer service! They were incredibly helpful, fast, and made sure every issue was resolved immediately. So impressed!

They charege based on ALL your orders in your store - doesent matter if the conversations are made throughou their app.

Great experience with the support team. Highly recommend this plugin for any Shopify store trying to experiment with different discount structures.

I couldn’t be more impressed with the support I received from Charlene at Monster Upsell. From the moment I reached out, she was exceptionally helpful, patient, and knowledgeable. She took the time to fully understand the issue, explained solutions clearly, and went above and beyond to make sure everything was working perfectly. Her communication was fast, friendly, and professional throughout the entire process. It’s rare to find customer support that truly cares, and Charlene absolutely delivered that. Thanks to her outstanding assistance, the entire experience was stress-free, and our store is now running better than ever. Charlene is an incredible asset to the Monster Upsell team, and I’m extremely grateful for her help! Highly recommended support — 10/10!

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!

The best app with the best support, stop searching !

This app is absolutely amazing and the support is even better!

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

So far the customer service has been great all my little teething issues have been sorted and now excited to see this app bring in the sales :) so happy i found an app to help! thanks guys

I'm not the best with IT so needed a bit of guidance and was so well looked after by Angelica who helped me through the set up stage. All working well now. Her help and patience was much appreciated. Thankyou

I had a play with over 10 different upsell+free gift apps, and Monster Cart came out the winner, offering everything I needed, easy customisation and fair pricing. The cherry on top, their customer support is next level. Highly recommend this app. Thanks, Monster Cart Team!

malisima atencion al cliente y despues no puedes ni cambiar colores, ni poner regalos ni nada

Monster Cart has THE BEST customer support, it's super accessible, they're fast to respond, friendly, and efficient. So many great customisations in the app, too. We love Monster Cart :)

Great app! Easy to set up, and makes you additional revenue with little to no effort! The support team is super fast and super helpful! They always resolved my issues in no time!! Everyone should install this app. It's a no-brainer!

The support team was so awesome and solved the cart issue super quick! thank you so much! Highly recommend Monster Cart Upsell!

Excellent Support and Quick Response! I had a great experience with the Monster Upsells team. Their support is excellent and super quick! A special thanks to Charlene, who was very helpful, friendly, and responsive throughout the process. She made everything so smooth and easy. Highly recommend this app and their amazing support team!

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.

Having some tech issues and Charlene noticed some other issues which she is getting fixed asap. Great App, great support!

the fastest chat service, and personable too! Fixed our issue within minutes.

Very responsive and warm! Thanks again!

Excellent team support. very helpful in getting things up and running. Friendly and quick! Thanks Monster Cart

Great, friendly customer service

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!

Monster Cart is very detailed, interactive and well laid out cart feature. We did notice it was a little slow at first. The customer service team were very quick to respond to our queries.

Great app & incredible customer service. Set up is super easy and there's plenty of videos that show you how to set up everything. Thank you!!

The Monster Cart Upsell is an excellent and highly useful tool that has provided me with a lot of convenience and great assistance. The technical team is also incredibly enthusiastic and has always offered me effective support whenever I needed it. I highly recommend it!

Really fast response! I had only added the app to a clients site and with in minutes they were helping me with a question I had and setting up a few things with me. Really great team!

Wow! The customer service is impeccable! I’m a newbie and the app is so easy and user friendly. I was stuck on one bit and spoke to Charlene who fixed it immediately. We are so happy with supporting them.

great experience with charlene very helpful and always goes an extra mile to help me with whatevers wrong, and gets things done quickly which is important for me as i run a lot of ads on facebook and cant have faults on my store. so shes a lifesaver! Thank!

Amazing customer service from Angelica, and the team. On a Sunday too! Thanks team :)