This review for a item on CodeCanyon. There are many stock notification system for woocommerce. But this plugin comes up with all features. You can send product updates by email, mobile & desktop push notification, instant SMS. You can send scheduled message on daily, weekly, monthly. It has 26 different messaging libraries integrated with. Everything is fully configurable. You can use your custom notification template in admin panel. You will notified for low stock product, back in stock product, product sale. You can enable disable each option. There detail report on stock both in tabular and graphical. You can export data. Hence, it has a combination of every option we need to increase our product sale. Here you will see the product: http://codecanyon.net/item/woocommerce-stock-notification-builder-sends-desktop-mobile-email-notifications/*******