All cart customization apps with features for additional fees

Add a "buy now" button, sticky add to cart, or whatever else helps customers complete their purchase.

374 apps with

Additional fees

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Essential Upsell & Cross Sell
5.0 out of 5 stars 1587 total reviews • Free plan available
Lift AOV with Frequently Bought Together Upsell and Cross-sell
EG Auto Add to Cart Free Gift
5.0 out of 5 stars 872 total reviews • Free trial available
Delight customers by adding targeted gifts to their carts
Essential Free Shipping Upsell
5.0 out of 5 stars 546 total reviews • Free plan available
Lift AOV via Free Shipping Bar Goal Cart Upsell and Cross Sell
Kaching AI Slide Cart Drawer
5.0 out of 5 stars 356 total reviews • Free plan available
Boost AOV with upsell, cart discounts, free shipping bar, etc.
ETP Sort Hide Payment Methods
5.0 out of 5 stars 175 total reviews • Free plan available
Hide, sort, reoder, rename payment methods with payment rules
Opus Cart Upsell Cart Drawer
4.9 out of 5 stars 453 total reviews • Free plan available
Boost Sales with Free Shipping Bar and Free Gift in slide cart
AOV Slide Cart Drawer Upsell
5.0 out of 5 stars 122 total reviews • Free
Boost CRO with cart upsell, free shipping bar & free gift
Square: Sticky Add to Cart Bar
5.0 out of 5 stars 98 total reviews • Free
Reduce abandonment by having the Sticky Bar always visible
Kaching Post Purchase Upsell
5.0 out of 5 stars 102 total reviews • Free plan available
Personalized one click upsell, thank you page, checkout upsell
Upcart—Cart Drawer Cart Upsell
4.7 out of 5 stars 668 total reviews • Free plan available
Add a Slide Cart with a Free Shipping Bar & Upsell Cart Widget
AMP Slide Cart Drawer
5.0 out of 5 stars 502 total reviews • Free plan available
Boost AOV with cart upsell offers & free shipping bar
CartBot: Gift with purchase
4.9 out of 5 stars 444 total reviews • Free plan available
Auto add to cart a gift with purchase, BOGO, buy X get Y, etc.
One Click Upsell ‑ Zipify OCU
4.6 out of 5 stars 450 total reviews • Free plan available
Increase AOV with AI post-purchase upsells & checkout upsells
Essential Sticky Add to Cart
5.0 out of 5 stars 210 total reviews • Free
Lift CRV with Sticky Cart: Add to Cart Bar, Quick Buy Button
EA • Cart Drawer Cart Upsell
5.0 out of 5 stars 101 total reviews • Free plan available
Grow via Slide Cart Drawer, Cart Upsell Sticky Add to Cart Bar
Qikify Slide Cart Drawer
4.9 out of 5 stars 413 total reviews • Free plan available
Add Slide Cart Drawer, Cart Upsell offers & Sticky Add to Cart
BeSure Checkout Rules
5.0 out of 5 stars 176 total reviews • Free plan available
Customize checkout behavior with conditional powerful rules
TnC: Terms and Conditions Box
4.9 out of 5 stars 447 total reviews • Free plan available
Boost security and age verification compliance in 1 click
XB: AI Cart Upsell Cart Drawer
5.0 out of 5 stars 163 total reviews • Free plan available
Slide Cart with Free Shipping Bar, Free Gift & Product Add-ons
Payflow: COD & Payment Methods
4.8 out of 5 stars 113 total reviews • Free plan available
Charge a fee for Cash on Delivery orders & customize checkout
iCart Cart Drawer Cart Upsell
4.8 out of 5 stars 399 total reviews • Free plan available
Add slide cart drawer with in cart upsell & free shipping bar
Kip: Sort Hide Payment Methods
4.9 out of 5 stars 77 total reviews • Free plan available
Take full control of payment methods with Kip customizations.
Corner Cart Drawer & Free Gift
4.8 out of 5 stars 263 total reviews • Free plan available
Slide cart drawer with free gift with purchase and cart upsell
Rebuy Personalization Engine
4.8 out of 5 stars 781 total reviews • Free plan available
AI recommendations: cart, checkout, and post-purchase upsells
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