Cart Block: checkout validator vs CartLock
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 4, 2026 for Cart Block, Nov 3, 2026 for CartLock.
The short answer
- Only Cart Block lists a free plan. Paid plans start at $3.99/month for Cart Block and $13.36/month for CartLock.
- Cart Block lists 15 features CartLock’s listing doesn’t mention, including Cart alerts, Collection-specific, Customer tags.
Head to head
- Australia
- Singapore
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
FREE DEV
- · Free for Shopify Plus sandbox stores
- · Free for dev stores
Premium Plan
- · - All Free Plan included
- · - Block Cart
- · - Block Checkout
- · - Premium Support
- · - Prevent Fraud
- · - Unlimited Checkout Validation Rules
Advanced Plan
- · - All Premium Plan included
- · - Block Cart And Checkout
- · - Mix Different Conditions
- · - Premium Support
- · - Target Specific Markets
- · - Unlimited Checkout Validation Rules
Ultimate Plan
- · - All Advanced Plan included
- · - Block Discount Codes
- · - Block with Specific Delivery Method
- · - Block with Specific Payment Method
- · - Premium Support
- · - Shopify Plus Only
CartLock Pro Month
- · Custom dynamic error messages
- · Enforce minimum spend order thresholds
- · Native Shopify Functions edge speed
- · Unlimited rules, zero hidden limits
- · Works with Shop Pay & express checkout
- · Zero theme edits or storefront lag
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCartBlock'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.
CartLock protects merchant profit margins by preventing customers from checking out below a set order value. Built natively with Shopify Functions, it executes server-side at checkout without modifying theme files. Unlike older apps relying on cart scripts, CartLock cannot be bypassed by express checkouts like ShopPay, ApplePay, or GooglePay.
- Block or validate purchase in product, cart and checkout page.
- Display warnings and messages on product pages, cart pages, and during checkout.
- Bots Block: protect your store from fraudulent transactions trough transparency.
- Built using "Native Shopify Functions” = Faster and More Integrated
- Edge checkout validation powered natively by Shopify Functions.
- Blocks 1-click & express checkouts including ShopPay, ApplePay & GooglePay.
- Custom error messages with dynamic {minSpend} and {subtotal} variables.
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  Cart Block | |
|---|---|---|
| Detected stores | 2 | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Apparel & Accessories, Electronics | Not published |
| Top store countries | Australia, Singapore | Not published |
Reviews
| Measure | Cart Block | |
|---|---|---|
| App Store rating | 4.7 ★ | Not published |
| App Store reviews | 26 | Not published |
| New reviews, 28 days | 3 | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Cart Block | |
|---|---|---|
| Free plan | Yes | Not listed |
| Lowest paid monthly plan | $3.99/month(ahead) | $13.36/month |
| Longest free trial | 7 days | 7 days |
| Plans listed | 4 | 1 |
Listing
| Measure | Cart Block | |
|---|---|---|
| Shopify category rank | #10 | Not enough data |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | Yes | No |
| Launched | Feb 2, 2024 | Nov 3, 2026 |
| Languages | 1 | 1 |
| Developer | Nextools | Logik Vorsprung Technologies |
FAQ
Cart Block and CartLock: common questions
- Is Cart Block or CartLock cheaper?
- Only Cart Block lists a free plan. Paid plans start at $3.99/month for Cart Block and $13.36/month for CartLock. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- What features does each app list that the other doesn’t?
- Cart Block lists 15 the others don’t mention, such as Cart alerts, Collection-specific, Customer tags, Discount-based. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 4, 2026 for Cart Block, Nov 3, 2026 for CartLock; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 4, 2026 for Cart Block, Nov 3, 2026 for CartLock. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.