Best alternatives for Ultimate Checkout Customizer Shopify app in 2026 [Updated]
PickYourApp Review Team
6 min read
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Sep 20, 2025
Optimize your Shopify checkout experience with essential apps for payment customization, order management, and upselling. Control payment methods, add COD fees, validate addresses, and boost sales with post-purchase offers. From customizing checkout rules to implementing one-click upsells, these apps help merchants reduce failed deliveries, increase average order value, and create smoother shopping experiences for customers.
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#1. Customize checkout behavior by showing shipping or payment methods the way you want.
Customize your checkout experience with flexible rules for shipping and payment methods. Control how options appear based on cart total, weight, address, product tags, and other conditions. Show, hide, rename or reorder methods to match your needs. Set default selections, prevent PO Box shipping, hide express checkout buttons, and apply targeted discounts to orders or shipping. Create a smoother checkout flow by displaying only relevant options to customers. Perfect for stores that need precise control over their checkout behavior and want to optimize the purchasing process.Install from Shopify App Store
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#2. Boost your AOV with checkout upsells, product & post purchase offers & thank you page editing
UpsellPlus is a comprehensive checkout upsell solution that helps increase your average order value through strategic offer placement. Add customized upsell offers directly within Shopify Checkout that match your store's design. The app lets you create targeted post-purchase flows, modify thank you pages, and optimize cart drawers without coding knowledge. Display smart upsell blocks based on what's in customers' carts, and track performance with built-in A/B testing and analytics. From product pages to checkout extensions, you can show relevant offers, reviews, banners, and payment options throughout the customer journey. Perfect for merchants wanting to maximize sales through seamless upselling at every touchpoint.Install from Shopify App Store
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#3. Turn every checkout into a profit engine with segmented, A/B‑tested optimization.
PrettyDamnQuick (PDQ) personalizes every step of your Shopify checkout process using AI-powered segmentation and testing. The app automatically optimizes shipping rates, delivery estimates, upsells, and checkout layouts for each customer segment, continuously testing to find the highest-converting combinations. Increase your store's conversion rates and average order value with customized checkout experiences. Real-time delivery promises and carrier rate optimization help reduce cart abandonment while maintaining your profit margins. The Track360 feature converts shipping updates into sales opportunities through branded tracking pages. Get started with white-glove onboarding and ongoing support, backed by an ROI guarantee. From cart to doorstep, PDQ helps create profitable, shopper-friendly experiences with testable checkout extensions including upsells, gifts, badges, and shipping protection.Install from Shopify App Store
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#4. Checkout rules and upsells with powerful checkout customizer to boost your checkout conversion.
Customize your Shopify checkout experience with Blockify Checkout Rules Plus. Set smart order limits, validate customer carts and addresses, and manage payment and shipping options without complex coding. The app helps prevent fraud and spam orders while offering checkout and post-purchase upsell opportunities to increase average order value. Whether you run B2C or B2B operations, you can create specific checkout rules to control what customers see and how they interact with your checkout page. Hide unnecessary options, reorder elements, or rename fields to reduce confusion and improve conversion rates. All checkout customization features work seamlessly with Shopify's native payment and shipping functions.Install from Shopify App Store
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#5. Add a fee and Show/Hide Cash on Delivery (COD) based on any condition. Encourage prepaid orders!
Take control of your Cash on Delivery (COD) payments with this advanced management app. Add custom fees to COD orders and set specific conditions for when to show or hide the COD option. Limit COD availability based on pin codes, states, or countries to reduce delivery risks. You can restrict COD for orders with discounts, specific products, or collections. The app helps prevent issues by letting you disable COD for high-risk customers through customer tags. Quick setup with simple tutorials gets you started in under a minute. Perfect for stores looking to encourage prepaid orders while maintaining COD as a flexible payment option.Install from Shopify App Store
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#6. Shipping rates: Reorder/sort, Rename & Hide at checkout page by various conditions like customer tag
Customize your Shopify checkout shipping options with advanced control over rates and delivery rules. Manage shipping rates by reordering, renaming, or hiding them based on customer tags, product categories, and location conditions. Set special B2B shipping rates, block PO Box addresses, and create custom rules for specific zip codes, suburbs, or rural areas. Schedule deliveries by day, time, or date including weekend and same-day options. Perfect for merchants who need precise shipping rate management and want to offer different rates for specific customer segments. The app lets you customize third-party shipping rates and create location-specific shipping rules, making it a comprehensive solution for complex shipping needs.Install from Shopify App Store
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#7. Control payment, shipping, and discounts with checkout rules for a cleaner, dynamic checkout flow.
SMART Checkout Rules gives you complete control over your store's checkout experience through customizable rules and conditions. Set up dynamic rules to manage payment methods, shipping options, and discount applications based on specific criteria like customer tags, countries, cart value, or products. Merchants can hide, block, sort, or rename checkout options to create smoother purchase flows. Perfect for handling high-risk transactions, implementing B2B checkout logic, and managing international orders - all without coding. The app helps create cleaner checkout experiences by applying smart rules for payment methods, shipping rates, and order validation, leading to better conversion rates and more efficient order processing.Install from Shopify App Store
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#8. Sell more, do less: Boost AOV with one-click upsell on Post purchase, Thank you & Order status page
Increase your average order value with smart post-purchase upsells that appear on thank you pages and order status screens. Customers can accept offers with just one click - no need to re-enter payment details. Create targeted upsell and downsell flows based on cart value, products, or location. The AI-powered templates help you launch campaigns quickly while real-time analytics show what's working. Customize the look to match your store's branding and create compelling offers using pre-made templates. Whether you want to offer special discounts, gift products, or exclusive deals, you can set advanced conditions to show the right offers to the right customers. Get support anytime with 24/7 customer service.Install from Shopify App Store
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#9. Lift conversion rates at checkout with behavior-based upsells and trust-building content.
Increase your checkout conversion rates by understanding exactly how shoppers behave before abandoning their carts. Using 400+ behavior signals, Conversion Companion helps you create personalized checkout experiences that convert. Display targeted upsells, trust badges, and urgency messages to the right customers at crucial moments. Monitor performance with monthly reports and A/B testing tools to optimize your results. The customizable checkout blocks work without coding, letting you make real-time changes based on product type, device, cart value, and more. Get detailed insights into drop-off points and shopper behavior patterns to stop losing sales. Start your 30-day free trial and turn more browsers into buyers.Install from Shopify App Store
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#10. Display 30-day reference prices, base prices & product properties!
Display essential product information and pricing details directly in your Shopify checkout with Addributes. The app helps you show legally required base prices, 30-day reference prices, and key product features in a clear, user-friendly format. Stay compliant with pricing regulations while providing transparent information to your customers. Manage product attributes easily through Excel import/export functionality and include variant metafields in both cart and checkout. The automatic price history tracking ensures accurate 30-day reference price display, helping you meet legal requirements like Article 246a §1 BGB and PAngV regulations. Make your checkout process more informative and legally compliant with Addributes.Install from Shopify App Store