Sticky Add to Cart by Tiwaa

Sticky Add to Cart by Tiwaa Labs keeps a clear Add to cart button in front of shoppers as they scroll a product page, so they can buy without scrolling back up. Choose a full-width sticky bar or a floating button, and add an optional Buy now button that goes straight to checkout. You control colors, button style, radius, border, shadow, position, and layout, plus custom CSS. The widget mirrors your theme's product form, so the variant and quantity are respected. Works on every theme.