Cart Lock:Block Checkout Rules vs CartShield: Checkout Rules
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 Lock:Block Checkout Rules, Nov 3, 2026 for CartShield.
The short answer
- Both list a free plan. Paid plans start at $6.99/month for Cart Lock:Block Checkout Rules and $19.99/month for CartShield.
- Cart Lock:Block Checkout Rules lists 8 features CartShield’s listing doesn’t mention, including Cart alerts, Collection-specific, Custom messages.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free Development
- · Cart total, quantity, products, delivery
- · Customer tag, company, discount, market
- · Free for dev store
- · Multiple rules & more
Essential
- · Includes 30+ conditions.
- · Multiple conditions with AND logic.
- · Unlimited orders. No coding required.
- · Up to 5 active rules.
Professional
- · Includes 30+ conditions.
- · Multiple conditions with AND logic.
- · Unlimited orders. No coding required.
- · Up to 10 active rules.
Elite
- · Includes 40+ conditions.
- · Multiple conditions with AND logic.
- · Multiple conditions with OR logic.
- · Unlimited orders. No coding required.
- · Up to 25 active rules.
Free Starter
- · 1 Active Checkout Validation Rule
- · Community Support
- · Standard PO Box & Address Validation
- · Sub-5ms WebAssembly Edge Execution
Pro Protection
- · B2B wholesale carton multiples
- · Collection min and max spend limits
- · Custom checkout error messages
- · PO Box and delivery blocker
- · Priority 24/7 merchant support
- · Real-time loss prevention telemetry
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCart Lock offers customizable conditions to block unwanted purchases based on specific rules such as country, product quantity, customer profiles, discounts, markets, and more—making it ideal for stopping bots. With real-time validation powered by Shopify Functions, it ensures only valid orders are placed. Transparency is maintained through clear warnings, keeping customers informed.
CartShield protects merchant profits by validating orders directly inside checkout using server-side Shopify Functions. Unlike legacy apps that rely on cart scripts bypassed by 1-click express wallets or browser tools, CartShield cannot be skipped. Prevent couriers from rejecting freight by blocking PO Boxes and parcel lockers.
- Block customers by country blocker, amount, minimum order quantity limits.
- Block fraud orders, block shipping, zip codes, states and block 0 orders.
- Validate orders, block cart currency, discount amounts, customer tags, company.
- Block country. Show warnings on cart, product pages and during checkout.
- Block PO Boxes and parcel lockers for heavy freight and restricted items
- Require qualifying catalog items to purchase discounted sample kits
- Enforce B2B wholesale case pack multiples like cartons of 6, 12, or 24
- Validate checkout server-side across express digital wallets and one-page flows
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 Lock:Block Checkout Rules | |
|---|---|---|
| Detected stores | Not published | 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 | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Cart Lock:Block Checkout Rules | |
|---|---|---|
| App Store rating | 4.8 ★ | Not published |
| App Store reviews | 89 | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | 13% | Not enough data |
Pricing
| Measure | Cart Lock:Block Checkout Rules | |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $6.99/month(ahead) | $19.99/month |
| Longest free trial | 3 days | 14 days |
| Plans listed | 4 | 2 |
Listing
| Measure | Cart Lock:Block Checkout Rules | |
|---|---|---|
| Shopify category rank | #15 | Not enough data |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Sep 11, 2024 | Nov 3, 2026 |
| Languages | 1 | 1 |
| Developer | KlinKode | ModApps |
FAQ
Cart Lock:Block Checkout Rules and CartShield: common questions
- Is Cart Lock:Block Checkout Rules or CartShield cheaper?
- Both list a free plan. Paid plans start at $6.99/month for Cart Lock:Block Checkout Rules and $19.99/month for CartShield. 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 Lock:Block Checkout Rules lists 8 the others don’t mention, such as Cart alerts, Collection-specific, Custom messages, Customer tags. 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 Lock:Block Checkout Rules, Nov 3, 2026 for CartShield; 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 Lock:Block Checkout Rules, Nov 3, 2026 for CartShield. 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.