A plugin that holds stock against a shopper the moment a guarded product is added to cart, so two customers cannot buy the same last unit.
During flash sales, two shoppers can add the last available unit of a product within seconds of each other. WooCommerce standard behaviour only checks stock on order placement, causing overselling and painful refunds.
Flash Sale Stock Guard reserves stock at the moment of adding to cart using database-level locking (GET_LOCK), ensuring zero concurrency issues during heavy traffic spikes.
Cart reservations are tied to timed sessions. If a user abandons checkout, an asynchronous WP-Cron / Action Scheduler event immediately returns the held unit to the public inventory pool.