Cart Block: checkout validator
by Nextools
4.9
(16 reviews)
Best suited for stores looking to reduce checkout abandonment by setting order limits and validating cart rules.
CartBlock validates or blocks any order, protects from bots and frauds using multiple conditions CartBlock's customizable conditions allow you to set specific rules, blocking purchases an orders based on criteria like product quantity, country, customer profiles, discount code and much more making it the perfect solution for blocking customers or bots. It maintains transparency through warnings and messages at critical points, ensuring customers are well-informed. A smart dynamic Captcha with single or multiple conditions can be added to the checkout. CartBlock's customizable conditions allow you to set specific rules, blocking purchases an orders based on criteria like product quantity, country, customer profiles, discount code and much more making it the perfect solution for blocking customers or bots. It maintains transparency through warnings and messages at critical points, ensuring customers are well-informed. A smart dynamic Captcha with single or multiple conditions can be added to the checkout. more Block or validate purchases/orders by multiple rules. Display warnings and messages on product pages, cart pages, and during checkout. Bots Block: protect your store from fraudulent transactions Smart Dynamic Captcha in the checkout with single or multiple conditions Multichannel support: in-app chat, website resources and social media engagement
Copy from the Shopify App Store listing, unedited.Order limits
Top line
conversion rate and average order value
From $3.99/mo
free plan available · 4 tiers
90/100
Well supported · from 16 reviews
What it does
Block or validate purchases/orders by multiple rules.
Display warnings and messages on product pages, cart pages, and during checkout.
Bots Block: protect your store from fraudulent transactions
Smart Dynamic Captcha in the checkout with single or multiple conditions
Multichannel support: in-app chat, website resources and social media engagement
What each step up actually buys you
This developer's plans are separated by features, not by how big your store is — so there is no volume that picks a tier for you. Here is what each one adds over the one below it.
FREE DEV
Free
Free for dev stores
Free for Shopify Plus sandbox stores
Premium Plan
$3.99/month
- All Free Plan included
- Unlimited Checkout Validation Rules
- Validate Shipping Address
- Validate Cart Items
- Block Checkout
- Block Cart
Advanced Plan
$5.99/month
- All Premium Plan included
- Mix Different Conditions
- Block Cart And Checkout
- Target Specific Markets
Ultimate Plan
$7.99/month
- All Advanced Plan included
- Shopify Plus Only
- Block Discount Codes
- Block with Specific Payment Method
- Block with Specific Delivery Method
Pricing
Free
$3.99/month
$5.99/month
$7.99/month
90
/ 100Well supported
Scored on 16 merchant reviews we hold for Cart Block: checkout validator, across five checks. Every figure is computed from those reviews — expand any row to see the counts behind it.
Recent reviews rate above this app's own average
Reviews in the last 12 months average 5.00, 0.31 stars above the lifetime average of 4.69.Review history
2024–2026 · 16 reviews read| 2024 | 6 reviews |
|---|---|
| 2025 | 6 reviews |
| 2026 | 4 reviews |
What merchants say
4.9
100%
of reviews get an answer0%
had used it a year when they wroteRecent merchant reviews
The newest 8 of 16. Open one to read it in full, with the developer's reply where there is one.
Andrea was incredibly helpful in getting the exact configuration we needed set up!
Great Experience
Great app, thanks Abhi for helping me!
There are a few things that can be tricky to set up...BUT FEAR NOT!! This support staff goes above and beyond to make sure you have the settings just right. Sometimes it takes a couple Validations to get things set up. The only way you are getting frustrated is if you don't use the in app chat to get connected to those who can help you most. Can't figure it out...they will help! Great features and works flawlessly so far!
I have a few products marked as $0 in my store because I am not permitted to put the pricing online, and even though I customized the "Add to Cart" button to say "Contact for Pricing", people would still click and check out these items at $0 (products have a $4,000-$14,000 value range). This app allowed me to set a rule that products below $1 cannot be checked out and it completely stopped the $0 orders! Took me about 3 minutes to set up once I installed the app, super easy!!
This a very promising app and beneficial for merchants who need to block certain customers or orders on their store. The support team is absolutely amazing and took the time to meet with me to resolve some issues with the app. The reason we gave it 4 stars is because there are still some issues depending on how you decide to block customers (there are multiple scenarios you can choose from). This isn't necessarily an issue with the merchant itself as there are some limitations with developing an app for Shopify. However, if you run into any issues we recommend contacting them for a one-on-one call before giving up. We highly recommend this app. There are not many options for this functionality (and honestly this may be the only one).
10/10 recommend this app - very functional and amazing customer service! I had a very specific and niche use case, I emailed customer service and Andrea was not only very prompt to respond but even released an update to his app that would allow it to work for our use case. Thank you!
Excellent app! We had BOTS card testing on our webstore and tried a few other apps that just didn't work. As of today, the BOTS are gone! Cart Block was simple to use and set up. We had minor issue at the beginning found out we had to update our checkout for this to work properly. Andrea was extremely helpful and was able to hop on a call with me. Thanks again! Looking forward to see what other apps you have to offer.
Cart Block: checkout validator FAQ
Answered from this app's own listing and its full review record.
Best suited for stores looking to reduce checkout abandonment by setting order limits and validating cart rules.
There is a free plan, paid plans start at $3.99/month, and run to $7.99/month across 4 published tiers. Prices are as listed on the Shopify App Store and can change — confirm before installing.
Cart Block: checkout validator's plans are separated by features rather than by store size — none of the tiers is capped on a volume you could state up front. Compare what each step adds over the one below it rather than trying to size yourself into a tier.
On our scorecard Cart Block: checkout validator rates 90 out of 100 — well supported — read from 16 merchant reviews. The developer has published replies to 16 of 16 reviews. The score reflects what the review record shows, nothing more.
16 merchants have reviewed Cart Block: checkout validator, averaging 4.9 out of 5. We hold the review history from 2024 to 2026, which is what the year-by-year chart on this page is built from.
At a glance
4.9 / 5 · 16 reviews
5.00 from 5 reviews
5 (was 6)
16 of 16 reviews
20 days
Free plan available. Free trial available.
February 2, 2024
2024 – 2026
Will AI shoppers find this store?
Apps like this one convert the traffic you already have. Getting recommended by ChatGPT and Perplexity is a separate problem.
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