Checkout King vs King Checkout Validation
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026 for Checkout King, Nov 9, 2026 for King Checkout Validation.
The short answer
- Both list a free plan. Paid plans start at $14.99/month for Checkout King and $4.99/month for King Checkout Validation.
- King Checkout Validation lists 5 features Checkout King’s listing doesn’t mention, including Collection-specific, Customer tags, Discount-based.
Head to head
- Australia
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
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
Free
- · Create and test validation rules
- · Free for development stores
Basic
- · Block PO box addresses
- · Live chat and email support
- · Require VAT numbers
- · Require house, apartment or suite number
Premium
- · All Basic features
- · Build regular expression rules
- · Combine cart and customer conditions
- · Detect non-Latin characters
- · Match keywords in checkout fields
- · Set checkout field length limits
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCheckout 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.
Use checkout validation to check shipping and billing address fields before orders are placed. Block PO boxes, require house or apartment numbers, and check postcode/ZIP, email and VAT/tax ID formats. Match phone country codes to address countries. Set order limits by cart amount, quantity or weight, with conditions for products, customer tags and countries. Use keyword, regex and field-length checks.
- 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
- Verifies presence of house/apartment number in addresses
- Validates completion of customer's VAT number (Tax exemption)
- Filters out Post Office (PO) Box addresses
- Field Length Validation, Custom Keyword and Regular Expression Validation
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 |  Checkout King |  King Checkout Validation |
|---|---|---|
| Detected stores | Not published | 1 |
| 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 | Home & Garden |
| Top store countries | Not published | Australia |
Reviews
| Measure | Checkout King | King Checkout Validation |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 20 |
| New reviews, 28 days | Not enough data | 0 |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Checkout King | King Checkout Validation |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $14.99/month | $4.99/month(ahead) |
| Longest free trial | 7 days | 7 days |
| Plans listed | 4 | 3 |
Listing
| Measure | Checkout King | King Checkout Validation |
|---|---|---|
| Shopify category rank | Not enough data | #24 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | Yes |
| Launched | Sep 23, 2026 | Mar 15, 2024 |
| Languages | 1 | 1 |
| Developer | Checkout King | Lightcone |
FAQ
Checkout King and King Checkout Validation: common questions
- Is Checkout King or King Checkout Validation cheaper?
- Both list a free plan. Paid plans start at $14.99/month for Checkout King and $4.99/month for King Checkout Validation. 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?
- Checkout King lists 4 the others don’t mention, such as Geolocation, Payment methods, Shipping methods, Time-based. King Checkout Validation lists 5 the others don’t mention, such as Collection-specific, Customer tags, Discount-based, Multi-language. 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 Oct 13, 2026 for Checkout King, Nov 9, 2026 for King Checkout Validation; 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 Oct 13, 2026 for Checkout King, Nov 9, 2026 for King Checkout Validation. 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.