Better Usability for WooCommerce removes the small but persistent friction points that cause shoppers to abandon: waiting for full page reloads, hunting for quantity controls, a cart step they did not need and checkout fields nobody fills in. A Buy now button takes a shopper from the product straight to the checkout, the checkout asks only what your store needs, and quantities can be changed — and items removed — right on the checkout page, free. It covers five areas — Shop, Product, Cart, Checkout and the whole store — with settings you can mix and match to fit your store.

Free features:

Cart

Auto-refresh cart totals via AJAX when quantity changes — no “Update cart” click required
Show a confirmation prompt before quantity is reduced to zero
Hide the “Update cart” button

Checkout

Edit the order right on the checkout: change quantities and remove items without going back to the cart (classic checkout)
Take the fields your store does not need out of the checkout — Company, Address line 2, Phone, Order notes (classic checkout and Checkout block)
Hide the coupon form on the checkout; it stays on the cart (classic checkout and Checkout block)
Do not ask for the billing address when every product in the order is virtual — name and e-mail are enough (classic checkout)
Display the unit price next to each product name

Shop

Change product quantity directly on the shop/archive page before adding to cart
AJAX “Add to cart” on individual product pages (same as the shop-loop behaviour)
Skip the cart page and go straight to checkout after adding a product
Customise the “Add to cart” and “View cart” button labels

Product

“Buy now” button beside “Add to cart”, on the product page (simple and variable products) and in the shop (simple products): it adds the product and takes the shopper straight to the checkout — optionally with only that product in the cart; its text is yours
Low-stock urgency badge (“Only 3 left in stock!”) near the Add to Cart button on both single product and shop/archive pages — it reads WooCommerce’s own per-product stock quantity and low-stock threshold, shows only for stock-managed products at or below that threshold, and is fully customisable (badge text with a {stock} placeholder, optional custom threshold), giving hesitant shoppers a scarcity nudge with zero configuration beyond a toggle

General

Show −/+ buttons around the quantity field — choose where: Shop, Product page, Cart, Checkout
Show the quantity as a dropdown select instead of a numeric input — choose where: Shop, Product page, Cart, Checkout
Lock the numeric input so shoppers can only use the +/− buttons (prevents accidental typing)
One “Updating…” text for the cart and price refreshes
Convert simple-product “Add to Cart” buttons to AJAX site-wide
“Added ✓” on the button and a small “Added to your cart” notice with a link to the cart, after an AJAX add to cart (its text is yours)
Hide the “Added to cart” notice after adding a product
Hide the “View cart” link after adding a product
Set a global maximum quantity per product
Decimal quantity support for +/− buttons
Accessible, WCAG-friendly quantity controls — the −/+ buttons carry proper “Decrease quantity” / “Increase quantity” labels, work with the keyboard (Enter/Space), and announce the new quantity (and the cart refresh) to screen readers

PRO features:

Variation swatches — each option of a variable product as a colour dot, the variation’s own picture or a button instead of a drop-down, on the product page and in the shop; the colour is set on the attribute’s term (Products > Attributes); options with no variation left are greyed out (view demo)
Sale countdown — “Sale ends in 2d 05:14:09” under the price, on the product page and in the shop, counting down to the end date of the sale you scheduled on the product (never a made-up deadline); shown only when the sale ends within the days you choose (view demo)
Sticky Add to Cart bar — a floating bar slides in when the shopper scrolls past the Add to Cart button, keeping purchase intent alive without hunting for the button; on phones, computers or both, with a variable product’s options and the Buy now button in the bar (view demo)
Quick View modal — shoppers open a full product preview in a lightbox (image, price, description, Add to Cart) without leaving the Shop page; keyboard accessible (focus stays in the lightbox and returns to the button on close) (view demo)
Synchronize cart quantities automatically when changed (view demo)
Auto-update price on Product and Shop pages as quantity changes (view demo)
Change product variations directly on the Shop page — fewer clicks to buy (view demo)
Sync the MiniCart widget live from Shop or Product pages (view demo)
AJAX delete on the checkout page — no full page reload (view demo)
Change quantities inside the Mini-Cart widget, with −/+ buttons (view demo)

Get the PRO version here.

Developer hooks

Filters and actions for theme and plugin developers (in your theme’s functions.php or a small plugin):

wbu_select_max_quantity (filter) — the largest quantity the quantity select offers, also the Cart/Checkout blocks’ cap when a maximum is set; args: $max, $product
wbu_max_quantity_message (filter) — the notice when an add to cart goes past “Max product quantity allowed”; args: $message, $max, $product_id, $new_quantity
wbu_low_stock_badge_html (filter) — the low-stock badge’s HTML; args: $html, $product, $stock, $threshold
wbu_direct_checkout_url (filter) — where “Go to checkout directly” sends the shopper; args: $checkout_url, $url
wbu_cart_update_response (filter) — the classic cart’s AJAX refresh after a quantity change; args: $response, $cart_item_key
wbu_checkout_quantity_updated (action) — a quantity changed on the checkout page was saved; args: $cart_item_key, $quantity
wbu_export_settings_payload (filter) and wbu_settings_imported (action) — the Tools tab’s settings export and import
wbu_get_template (filter) — a template’s path, to use your own copy; args: $path, $name
wbu_buy_now_button_html (filter) — the “Buy now” button’s HTML; args: $html, $product, $place (product or shop)
wbu_buy_now_redirect_url (filter) — where “Buy now” sends the shopper; args: $checkout_url, $url
Also: wbu_is_shop_loop, wbu_enable_quantity_input, wbu_enable_qtybuttons, wbu_qtybtn_minus / wbu_qtybtn_plus, wbu_shop_quantity_value, wbu_low_stock_threshold, wbu_frontend_vars (the settings the scripts get) and mh_wbu_settings (the settings and their defaults)