Tuhin

One Click Buy Now Button lets you add a quick checkout button below WooCommerce’s Add to Cart button. 
It redirects customers straight to checkout, skipping the cart page.
<h3>Features:</h3>
<ul>
<li>Enable/Disable option from admin</li>
<li>Customize button text, color, and hover color</li>
<li>Works with both simple and variable products</li>
<li>Secure AJAX-based add-to-cart with nonce verification</li>
<li>Lightweight and easy to use</li>
<li>Compatible with latest WooCommerce & WordPress</li>
</ul>

One Click Buy Now Button

Add a fully customizable "Buy Now" button under WooCommerce Add to Cart. Secure, lightweight and works with both simple and variable products.

Wpbens

Asadullah Galib

<a href="https://wpbens.com/plugins/quicker/" rel="nofollow ugc">Quicker</a> is an advanced WooCommerce plugin designed to streamline your store’s checkout process, reduce cart abandonment, and increase conversions. It lets you customize checkout fields, provide product addons, set order bumps or upsells, add conditional fees, enable AJAX-add-to-cart, enforce order amount limits, and more — all in a user-friendly way, without coding.
Make your WooCommerce checkout lightning fast and optimized for sales. With <a href="https://wpbens.com/plugins/quicker/" rel="nofollow ugc">Quicker</a>
Features
<ul>
<li>Reduce checkout friction by using a single-step or multi-step checkout flow </li>
<li>Skip the cart page — customers can go directly from product to checkout </li>
<li>Customize checkout fields: add, remove, reorder, and conditionally show them </li>
<li>Add product addons or upgrades on product pages or at checkout </li>
<li>Promote additional offers via order bumps / checkout upsells </li>
<li>Enforce minimum or maximum order amounts </li>
<li>Add extra fees (service, delivery, or other conditional fees) based on product, shipping method, user role or payment method </li>
<li>Provide Cash-on-Delivery (COD) with conditional visibility </li>
<li>Show a mini cart / quick cart preview </li>
<li>Allow AJAX add-to-cart for simple or variable products </li>
<li>Quick view for products: preview product details without leaving the shop page </li>
</ul>
<h3>🔥 WHAT’S NEXT</h3>
If you like Quicker, then consider checking out other WordPress Plugins made by the same team:
🔔 <a href="https://wordpress.org/plugins/memberhub/" rel="ugc">MemberHub</a> – MemberHub for WordPress and WooCommerce and Boost your sales 
🔔 <a href="https://wordpress.org/plugins/filter-plus/" rel="ugc">Filter Plus</a> – It is a WordPress and WooCommerce Product Filter Plugin that allows users to add multiple filtering features like filter by Ratings, Tags, Price Range, Custom Fields etc. 
🔔 <a href="https://wordpress.org/plugins/discountify/" rel="ugc">Discountify</a> – Discount Rules, Dynamic Pricing for WooCommerce 
🔔 <a href="https://wordpress.org/plugins/bens-email-marketing-automation/" rel="ugc">Bens Email Marketing & Automation</a> – Fast and simple Email Marketing, Newsletters, Automation & CRM for WordPress

Quicker – WooCommerce Quick Checkout Plugin

Quicker is advanced WooCommerce quick check out plugin to add custom fields along with multi-step checkout, and set upsell and quick sell options.

One Click Buy Now Button vs Quicker – WooCommerce Quick Checkout Plugin