All cart customization apps with features for custom css

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

408 apps with

Custom CSS

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Essential Upsell & Cross Sell
5.0 out of 5 stars 2080 total reviews • Free plan available
Lift AOV with Frequently Bought Together Upsell and Cross-sell
AOV.ai Cart Drawer Cart Upsell
5.0 out of 5 stars 717 total reviews • Free
Slide cart drawer with cart upsell, rewards & free shipping
Kaching CartDrawer Cart Upsell
5.0 out of 5 stars 823 total reviews • Free plan available
Boost your AOV: slide cart, upsell cart & free shipping bar
Essential Slide Cart Drawer
5.0 out of 5 stars 452 total reviews • Free
Lift AOV with Slide Cart drawer upsells & sticky add to cart
Essential Free Shipping Upsell
4.9 out of 5 stars 787 total reviews • Free plan available
Lift AOV via Free Shipping Bar Goal Cart Upsell and Cross Sell
EG Auto Add to Cart Free Gift
5.0 out of 5 stars 992 total reviews • Free trial available
Delight customers by adding targeted gifts to their carts
Kaching Post Purchase Upsell
5.0 out of 5 stars 226 total reviews • Free plan available
Boost AOV via 1-click Checkout upsells & Thank You page offers
Amp Slide Cart Upsell Drawer
4.9 out of 5 stars 639 total reviews • Free plan available
Add slide cart to boost AOV with upsells & free shipping bar
Upcart—Cart Drawer Cart Upsell
4.6 out of 5 stars 745 total reviews • Free plan available
Boost AOV w/ slide cart, reward bar, upsell cart & free gifts
EA • Sticky Add to Cart Drawer
4.9 out of 5 stars 158 total reviews • Free
Grow via Slide Cart Drawer, Cart Upsell Sticky Add to Cart Bar
RA Term and Condition Checkbox
4.9 out of 5 stars 171 total reviews • Free plan available
Reduce Liability with Checkout Rules & Age Verification
Upsell.com ‑ ReConvert Upsell
4.8 out of 5 stars 2848 total reviews • Free plan available
Create Cart Upsell & Cross Sell + Post Purchase Upsell Funnels
Kip: Sort Hide Payment Methods
4.9 out of 5 stars 112 total reviews • Free plan available
Take full control of payment methods with Kip customizations.
CartBot: Gift with purchase
4.9 out of 5 stars 478 total reviews • Free plan available
Auto add to cart a gift with purchase, BOGO, buy X get Y, etc.
TnC: Terms and Conditions Box
4.9 out of 5 stars 469 total reviews • Free plan available
Terms and Conditions Checkbox: Age verification checkout rules
Square: Sticky Add to Cart Bar
5.0 out of 5 stars 143 total reviews • Free
Keep the Sticky Add to Cart Bar visible on scroll to boost AOV
Payflow: COD & Payment Methods
4.9 out of 5 stars 109 total reviews • Free plan available
Charge a fee for Cash on Delivery orders & customize checkout
XB: AI Cart Upsell Cart Drawer
5.0 out of 5 stars 203 total reviews • Free plan available
Slide Cart with Free Shipping Bar, Free Gift & Product Add-ons
Opus Cart Drawer Cart Upsell
5.0 out of 5 stars 533 total reviews • Free plan available
Boost Sales w Slide cart drawer, Rewards bar, Free Gifts, etc
Scala Payment Method Discount
5.0 out of 5 stars 47 total reviews • Free
Offer payment method based discounts during checkout
One Click Upsell ‑ Zipify OCU
4.5 out of 5 stars 504 total reviews • Free plan available
Increase AOV with AI post-purchase upsells & checkout upsells
BeSure Checkout Rules
5.0 out of 5 stars 186 total reviews • Free plan available
Customize checkout behavior with conditional powerful rules
Rebuy Personalization Engine
4.7 out of 5 stars 810 total reviews • Free plan available
AI recommendations: cart, checkout, and post-purchase upsells
Wi Buy Now: Sticky Add to Cart
5.0 out of 5 stars 35 total reviews • Free
Boost CTR by sticky add to cart button, buy now button
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408 apps with

Custom CSS

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