Blockify Checkout Customizer vs Checkout King
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 9, 2026 for Blockify Checkout Customizer, Oct 13, 2026 for Checkout King.
The short answer
- Both list a free plan. Paid plans start at $9.99/month for Blockify Checkout Customizer and $14.99/month for Checkout King.
- Blockify Checkout Customizer lists 8 features Checkout King’s listing doesn’t mention, including Cart alerts, Collection-specific, Custom branding.
Head to head
- United States
- United Kingdom
- Canada
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
FREE
- · 1 active single rule (Limited condition)
- · 24/7 Live chat support
- · Best for development stores
BASIC
- · 1 Hide dynamic payment
- · 1 active sync Payment, Shipping
- · 24/7 Live chat support
- · 3 active Shipping Discounts
- · 3 active checkout validation rules
PREMIUM
- · 24/7 Live chat support
- · No limit to set COD fee
- · Order Status Page Customization
- · Unlimited Checkout validation rules
- · Unlimited Payment & Shipping rules
- · Unlimited Shipping Discounts rules
SHOPIFY PLUS
- · All include in Premium
- · Checkout Page Customizations
- · Checkout Upsell & Discounts
- · Exclusive Shopify Plus Condition Set
- · Order Status Page Customization
- · VIP Tier Support
Free
- · 1 active rule, unlimited drafts
- · Automatic discount rules
- · Delivery, payment & checkout rules
- · Our branding on blocked messages
- · Rule simulator and conflict checks
Starter
- · Automatic discount rules
- · Delivery, payment & checkout rules
- · Order confirmation messages
- · Rule simulator and conflict checks
- · Unlimited active rules
- · Your own blocked-checkout wording
Growth
- · Everything in Starter
- · Priority support
- · Rule impact reporting
- · Scheduled rules with start/end dates
- · Version history and rollback
Plus
- · Checkout page content blocks
- · Checkout page fields
- · Everything in Growth
- · Price-override bundles
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureBlockify brings powerful checkout customization and checkout rules to your Shopify store. Use Blockify Checkout Rules customizer, validate carts and addresses, set oder limits, and streamline payment and shipping. Reduce friction on checkout customization & stop spam and fake orders with checkout form, and boost AOV with checkout rules/blocks and post‑purchase blocks.
Checkout King controls what customers see at checkout — delivery options, payment methods, discounts, and whether an order can be placed. Write rules once — hide express shipping over 5kg, block PO box addresses, rename a payment method, discount large orders — and they apply automatically. The simulator shows which rules fire on a test cart before it goes live, and warns when rules contradict each other.
- Manage your info validation, payment, shipping on checkout page in 1 dashboard
- Create & validate checkout rules by shipping address, customer, date time, cart
- Hide shipping/payment methods to tailor checkout experience for customers
- Hide Express Checkout button on checkout page
- Hide, rename, reorder delivery options, payment methods by cart, addr, customer
- Block checkout on rules you set PO boxes, postcodes, missing details
- Test rule against a sample cart before it goes live, and catch conflicting rules
- Automatic discounts on products, orders and shipping, with no discount codes
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 | Blockify Checkout Customizer |  Checkout King |
|---|---|---|
| Detected stores | 3,009 | Not published |
| Net store change, 28 days | +23 | 0 |
| Stores added, 28 days | 43 | Not enough data |
| Big-brand share | 17% | Not enough data |
| Top store categories | Apparel & Accessories, Health & Beauty, Home & Garden | Not published |
| Top store countries | United States, United Kingdom, Canada | Not published |
Reviews
| Measure | Blockify Checkout Customizer | Checkout King |
|---|---|---|
| App Store rating | 4.9 ★ | Not published |
| App Store reviews | 319 | Not published |
| New reviews, 28 days | 10 | Not enough data |
| Reviewers a year or more in | 6% | Not enough data |
Pricing
| Measure | Blockify Checkout Customizer | Checkout King |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $9.99/month(ahead) | $14.99/month |
| Longest free trial | 3 days | 7 days |
| Plans listed | 4 | 4 |
Listing
| Measure | Blockify Checkout Customizer | Checkout King |
|---|---|---|
| Shopify category rank | #1 | Not enough data |
| Shopify App Charts | #1 in Checkout - Other | Not on this week’s charts |
| Built for Shopify | Yes | No |
| Launched | Aug 19, 2024 | Sep 23, 2026 |
| Languages | 1 | 1 |
| Developer | Blockify | Checkout King |
FAQ
Blockify Checkout Customizer and Checkout King: common questions
- Is Blockify Checkout Customizer or Checkout King cheaper?
- Both list a free plan. Paid plans start at $9.99/month for Blockify Checkout Customizer and $14.99/month for Checkout King. 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?
- Blockify Checkout Customizer lists 8 the others don’t mention, such as Cart alerts, Collection-specific, Custom branding, Customer tags. Checkout King lists 7 the others don’t mention, such as Cart-based, Geolocation, Payment methods, Price-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 9, 2026 for Blockify Checkout Customizer, Oct 13, 2026 for Checkout King; 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 9, 2026 for Blockify Checkout Customizer, Oct 13, 2026 for Checkout King. 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.