Best Cart customization apps for Shopify

CatApp · since 2025 · Cart customization

Floating buy button bar — always visible on desktop & mobile

Mimico Apps · since 2024 · Cart customization

Customers can share carts via link, social or in chat apps

South Pole · since 2020 · Donations

Empower your customers to offset carbon emissions at checkout

Opus Team · since 2026 · Cart customization

Boost conversion with the Add to cart button ready to click

graffiti solutions · since 2025 · Cart customization

Sticky Buy It Now Button while scrolling Long Descriptions

Reforesta · since 2023 · Donations

Increase your sales and plant trees with each purchase.

Opus Team · since 2024 · Upsell and cross-sell

Boost Sales w Slide cart drawer, Rewards bar, Free Gifts, etc

Effective Apps · since 2019 · Legal

Terms and Conditions Checkbox: Age verification checkout rules

Bundler.app · since 2022 · Discounts

Auto add to cart a gift with purchase, BOGO, buy X get Y, etc.

Codeinero · since 2016 · Banners

Grow w/ sticky add to cart bar, quick buy button & sticky cart

Qikify · since 2019 · Upsell and cross-sell

Add slide cart drawer, sticky cart, progress bar, cart upsell

Assortion · since 2021 · Cart customization

Create product bundles, volume discount, and upsell offers

Corner: Referrals, Upsell & Rewards · since 2019 · Product bundles

Slide cart drawer with free gift with purchase and cart upsell

Mason · since 2020 · Cart customization

Engage, convert & upsell anonymous visitors with 30+ playbooks

Relentless Apps · since 2023 · Cart customization

Terms and Conditions Checkbox, Checkout Rules Age Verification

EasyApps · since 2024 · Cart customization

Grow via Slide Cart Drawer, Cart Upsell Sticky Add to Cart Bar

MakeProSimp · since 2017 · Banners

Display Sticky Add to Cart, Quick Buy, Sticky Cart & more

CWILL · since 2019 · Cart customization

Formerly SEOAnt - Display Sticky Add to cart, Quick Buy Icon

Advan Software · since 2023 · Cart customization

Take full control of payment methods with Kip customizations.

Syncube 🥇 · since 2020 · Discounts

Boost sales with cart discounts & free shipping bar