UpCart is a powerful Shopify app that allows you to create a custom and on-brand slide cart with upsells and add-ons to increase your average order value. With UpCart, you can provide your customers with an easy-to-use and visually appealing cart experience that seamlessly integrates with the rest of your website. It offers features such as in-cart upselling and cross-selling blocks, free shipping or discount promotion bars, cart announcements to share updates about your brand, and the ability to create add-on options for products like shipping insurance. Additionally, UpCart helps boost conversion rates and reduce cart abandonment with a sticky cart button that improves the visibility of the view cart button.