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Best Payment Customizations powered by Functions Shopify apps in 2026 [Updated]
PickYourApp Review Team
6 min read
•
Jun 02, 2026
The Best Shopify payment customization apps powered by Functions let merchants take precise control over their checkout experience. From hiding and reordering payment methods to adding COD fees and validating addresses, these apps provide essential tools for customizing how customers pay. Whether you need to show region-specific payment options, verify COD orders through OTP, or set up conditional checkout rules, this collection offers proven solutions to tailor your store's payment process while reducing failed orders and delivery issues.
| Name | Rate on Shopify | Price | Free trial | Key features |
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#1. Reduce RTO/RTS, Verify COD via OTP, Offer split payments upfront, add fees or convert COD to prepaid
COD King helps you reduce RTO/RTS costs and eliminate fake COD orders through OTP verification via SMS or WhatsApp. Verify customer intent and secure commitment by collecting partial payments, upfront payments, or deposits to filter out unserious buyers and joy reservers. Add COD fees to encourage prepaid conversions, or offer prepaid discounts to convert COD orders to prepaid. Show or hide COD at checkout based on location, order value, or specific products. Send automated SMS and WhatsApp notifications to keep customers informed. Stop losing money on failed deliveries and returns. Secure split payments, reduce RTO costs, and maximize profit with smart checkout optimization that turns every order into a confirmed sale. -
#2. Validate checkout, add payment, shipping & discount rules, checkout blocks & post-purchase upsells
SMART Checkout Rules & Upsells gives merchants complete control over their checkout experience with flexible validation rules and customization options. Hide, block, sort, or rename payment methods and shipping options based on conditions like customer tags, country, cart value, products, or discount codes. Perfect for managing high-risk orders, blocking COD or specific payment methods like PayPal and Credit Card by customer criteria. Grow your average order value with one-click post-purchase upsells and downsells that appear after checkout. Add checkout blocks including banners and discount codes with conditional display rules. Apply checkout validation and discount logic based on cart total, customer tags, or delivery method. Ideal for B2B stores, international shipping flows, and merchants who need advanced checkout control without coding. Control your checkout rules and increase conversions with smarter upsell strategies. -
#3. Hide, sort & rename checkout payment methods based on rules like country, cart value, or shipping.
Take control of your Shopify checkout payment options with ETP Sort & Hide Payment Methods. Customize how payment methods appear by hiding, sorting, or renaming options like PayPal, credit cards, Cash on Delivery (COD), and manual payments. Create specific rules based on shopping cart value, shipping method, customer location, product SKUs, or customer tags. The app lets you show only relevant payment options to different customers without any coding needed. All changes apply instantly to your checkout, making it easier for customers to complete their purchase with their preferred payment method. -
#4. Checkout rules and checkout to power checkout customizer an boost your checkout conversion rate.
Blockify Checkout Customizer helps you set up checkout rules and customize your checkout page to increase conversion rates. This app lets you validate carts and addresses, enforce order limits, and manage payment and shipping options with ease. Hide, reorder, or rename checkout elements to reduce customer confusion and create a smoother experience. Use checkout rules to prevent spam and risky orders while protecting your revenue. The app includes post-purchase upsell blocks to lift your average order value. Perfect for both B2C and B2B stores, Blockify offers checkout extensibility functions that let you tailor discounts, payment methods, and shipping rules to match your business needs. Customize your checkout form and apply refined rules to control the entire checkout experience and stop fake orders before they happen. -
#5. Customize checkout using powerful checkout rules to streamline and boost checkout conversion.
Customize your Shopify checkout experience with flexible checkout rules that help increase conversions. Control how shipping and payment methods appear based on specific conditions like cart total, weight, product tags, or customer location. Show, hide, rename or reorder checkout options to match your business needs. Set default shipping methods, restrict PO Box deliveries, manage express payment buttons, and apply targeted discounts. Create a smoother checkout flow by displaying only relevant options to each customer. Perfect for merchants who want to optimize their checkout process while improving customer satisfaction. -
#6. Set COD fees & rules. Collect Partial, Split & Deposit Payments. Verify COD Orders with WhatsApp OTP
Releasit COD Fee & Partial Pay helps you manage Cash on Delivery orders with flexible fees, payment options, and fraud prevention. Add COD fees or discounts based on country, product, collection, customer group, or order value to encourage prepaid orders. Accept partial payments, split payments, or deposit payments upfront using fixed or percentage amounts. Reduce fake orders and failed deliveries with WhatsApp OTP verification that confirms customer intent before checkout. Track all payments with detailed records showing paid and due balances by date, method, and amount. Set conditional rules to enable or disable COD based on your business needs. The app supports multilingual checkout text and offers fast setup to start securing your COD orders right away. -
#7. Enable Taiwan Convenient Store Pickup shipping method and integrate e-invoice
Simplify your Taiwan e-commerce operations with this comprehensive solution for convenience store pickup, logistics, and e-invoicing. As the only Shopify Plus Partner in Taiwan, we integrate essential services including CVS pickup locations, HCT, T-CAT, and Chunghwa Post delivery options, along with electronic invoice management. Set different shipping rates for main island and outlying areas, automatically generate shipping labels, and send e-invoices directly to customers. This all-in-one app eliminates the need for multiple installations, making your store management more efficient while improving the shopping experience for your Taiwan-based customers. -
#8. Say goodbye to irrelevant payment options and costs with HidePay. Hiding, sorting & renaming easier.
HidePay gives you complete control over payment methods in your Shopify checkout process. You can hide, sort, and rename payment options based on multiple conditions including products, customer groups, geography, and cart details. The app helps reduce unwanted chargebacks and shipping fees that often impact merchant profits. For Shopify Plus stores, you can disable PayPal Express, while all merchants can hide Express Checkout buttons. Built with Native Shopify Functions, HidePay ensures fast, seamless integration with your store. The app makes checkout more relevant for customers while protecting your business from unnecessary costs. Get support through email, chat, online resources, and social media channels whenever you need help. -
#9. Charge custom fees for COD, link COD payment to shipping, or hide COD based on set conditions.
ACOD Cash on Delivery helps merchants manage their COD payment options with precision and flexibility. Set custom fees for cash on delivery orders and connect COD payments to specific shipping methods of your choice. You can show or hide the COD payment option based on various conditions like shipping destination. This practical app gives you complete control over when and how customers can use cash on delivery, making COD management straightforward and organized. Perfect for businesses looking to offer cash on delivery while maintaining control over their payment settings and customer experience. -
#10. Create advanced functions for discounts, payments, delivery, and cart & checkout validations.
This app helps you create advanced Shopify Functions for discounts, payments, delivery, and checkout validations without coding. Build tiered discounts, BOGO functions, bundles, volume discounts, and custom promos using a simple no-code function creator. Perfect for migrating Shopify Scripts to Functions with just a few clicks. Works on all Shopify plans - no Plus plan required. Set up payment customizations, delivery customizations, and checkout rules to control your store's logic. The script editor alternative makes it easy to apply bulk discounts, automate bundle offers, and create flexible discount functions. A complete Shopify Scripts replacement solution with active maintenance to help you build custom functions and manage your checkout experience.
