Best Checkout Apps for Shopify in 2026
Compare the best checkout apps for Shopify in 2026. Add custom upsells, post-purchase offers, payment customizations, COD order forms, and conversion-boosting widgets to Shopify Checkout. Independent reviews — no paid placements.
All Checkout Apps
Boost AOV by 25-40% with our slide cart drawer. Features upsells, free shipping bars, rewards & cart discount.
Seamlessly customize your checkout with powerful custom rules.
Boost AOV w/ slide cart, reward bar, upsell cart & free gifts.
Discover the ultimate checkout app—engage shoppers, boost conversions, and minimize RTOs!
EG Auto Add to Cart makes Free GWP, BOGOs & Upsell promos easy to run. Helping you boost AV and conversion rates.
Customize Checkout, Thank you, and Order status pages with banners, buttons, images, text, and more.
Shopify Terms and Conditions app for Shopify, checkout rules, age verification. Add an I agree to terms and conditions checkbox on the cart page & drawer cart.
Increase revenue & boost average order value overnight with pre & post-purchase upsells — without a designer or developer! True 1 click upsell funnels.
Upgrade your customer journey with Rebuy's flexible, integrated and customizable toolset: Smart Cart + Links, Post-Purchase, Re-Order Landing Page, and more.
Add a terms and conditions checkbox to the cart page, so customers will be required to tick it before proceeding to checkout
Create a Buy Button for any product or collection and add it to a website or blog
Allow your customers to quickly add to cart and buy your products
Take control of your checkout experience by conditionally showing, hiding, renaming, or reordering shipping and payment methods based on cart total, weight, address, items, tags, or other conditions
MinMaxify is a Shopify app to easily set min and max limits on the number of products a customer can purchase. Manage customer orders with ease today!
Integrate Cash on Delivery (COD) with added fees to your store. Conditionally customize payment and shipping methods seamlessly for better checkout experience.
Add a terms and conditions checkbox to your store with just 1 click and require customers to agree to your store's privacy policy, shipping policy and more.
Advanced upsell, cross-sell and increase AOV with BOGO, Buy X Get Y, Frequently Bought Together.
Boost sales with Qikify Cart Drawer Cart Upsell: reduce cart abandonment, add strategic upsells, and create seamless shopping experiences.
Qikify Checkout Customizer: Powerful extensions to customize Shopify Checkout Extensibility: styling, upsell, adding fields, validating checkout w/ rules & more
With Orichi Quantity Discount, Minimum Order Limits app, you can easily create quantity discounts, quantity breaks, and order limits minmaxify for any products
Top Order Limits Shopify App - Manage quantities effectively to ensure products reach the right customers, prevent fraud/ block bulk purchases by single buyers
Boost sales with Monster Cart! In-cart upsells, cross-sells, progress bars, free gift with purchase, volume discounts. To maximize average order value and MORE!
ETP Sort & Hide Payment Methods gives you full control over checkout payment options
Why Checkout Optimization Has the Highest ROI
The average Shopify store loses 70% of carts at checkout. Even small improvements — clearer shipping costs, trust badges, post-purchase upsells, or a COD option for emerging markets — can recover 5-15% of lost revenue. Checkout apps now use Shopify's native Checkout Extensibility (replacing checkout.liquid) which means faster, more reliable customizations. Every app below is independently reviewed. No app pays for placement.
How to Choose the Best Checkout App for Shopify
1. Use Checkout Extensibility (not deprecated checkout.liquid)
Shopify deprecated checkout.liquid customizations in 2024. All new apps must use Checkout Extensibility — modern, faster, more reliable. Avoid any app that still uses checkout.liquid; they'll break.
2. Pick by Goal
- Post-purchase upsells: One-click offers between checkout and thank-you page. Aftersell, ReConvert, Kaching Post Purchase.
- Cart-to-checkout upsells: Last-chance offers in cart drawer. Oxify Cart Drawer, Essential Cart Drawer.
- COD order forms: Critical for India, MENA. Releasit COD Order Form, Easy Order Form.
- Trust + UX widgets at checkout: Smart Checkout Widgets adds badges, FAQ, urgency.
3. Shopify Plan Requirements
Some checkout customizations are Shopify Plus only (custom payment methods, advanced UI). Standard plan stores can still use checkout extensions but with fewer surface options.
4. Test Acceptance Rates
Post-purchase upsells typically convert 5-15%. Below that, the offer is wrong. A/B test offers, prices, and copy for 2-4 weeks. The best offers are complementary, lower-priced than main purchase, and time-bound.
5. Pricing
Most checkout apps cost $9-$99/month. Post-purchase apps often charge by revenue (1-3% of upsell revenue). For high-volume stores, flat-fee plans work out cheaper.
Frequently Asked Questions
Common questions about checkout apps for Shopify stores.