OngoingAI

Usage & market intelligence

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Shopify rating
5.0 ★
20 reviews
Pricing
Free plan available
Free
Free
  • • Free for development stores
  • • Create and test validation rules
Basic
$4.99/month
7-day free trial · or $49.90/year and save 17%
  • • Live chat and email support
  • • Require house, apartment or suite number
  • • Require VAT numbers
  • • Block PO box addresses
Premium
$9.99/month
7-day free trial · or $99.90/year and save 17%
  • • All Basic features
  • • Detect non-Latin characters
  • • Set checkout field length limits
  • • Match keywords in checkout fields
  • • Build regular expression rules
What does King Checkout Validation do?

Block checkout with address validation and order limits. Check PO boxes, missing house numbers and VAT formats. Build custom checkout rules with clear errors.

  • Address validation: block PO boxes and require house or apartment numbers
  • Set order limits by amount, quantity or weight for products and customer tags
  • Check postcode/ZIP, email and VAT/tax ID formats with checkout field rules
  • Match phone country codes to shipping or billing countries
  • Build keyword, regex and field-length rules with localized error messages

Features

Order limitsCart-basedMax quantityMin quantityWeight-basedPrice-basedDiscount-basedProduct-specificVariant-specificCollection-specificCustomer tagsGeolocationShipping methodsCheckout alertsCustom messagesMulti-languageCheckout - Other
Review history
Daily review count on the Shopify App Store
20+2 · 30d~0.1/day· Rating steady at 5.0★

Daily tracking from Aug 10, 2026 through today · 30 days observed · sign up free for the full history →

Category rankings
Live organic position on Shopify App Store category pages
  • Order limits
    #10▲3
  • Checkout - Other#19

Tracked daily · last 30 days · as of 2026-09-24

Catalog position
Within Order limits on the App Store
Rank by reviews
#21 of 110
Review percentile
82th
Rating percentile
100th
On the App Store
2.5 yrs
Works with
Integrations listed for King Checkout Validation
CheckoutShopify Admin
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Frequently asked questions

Block checkout with address validation and order limits. Check PO boxes, missing house numbers and VAT formats. Build custom checkout rules with clear errors. It's a order limits tool for ecommerce stores.