Instantio (Formerly WooInstant) reduces your Cart Abandonment rate by minimizing the steps of WooCommerce Checkout process. With it’s floating cart icon, it converts multistep checkout into WooCommerce Same Page Instant Checkout. The Whole WooCommerce checkout process would take only 10-15 seconds. Yes, you heard it right! Only 10-15 Seconds! All your customer has to do is “Add to Cart”, a popup/cart drawer will appear with the cart view. Your customer can Direct Checkout WooCommerce based store and order from that single window!

Demo: https://codecanyon.net/item/wooinstant-woocommerce-instant-onepage-direct-checkout/22901975