One app to handle all purchase restrictions, including pre-orders (pay-later options), quantity limits (minimum of x, maximum of y), limited-time sales (available from x day to y day), pre-announcements (available from x), bundle restrictions (e.g., A and B cannot be purchased together), and customer-specific restrictions (login required, customer tags, quantity each/day). The Cart and Checkout Validation API is used. Order rules can be applied to products, collections, tags, and customer tags.

Quantity limit (from x to y items)Pre-orderTerm limit (from x month x day to y month y day)Simultaneous purchase limit (No product A and product B at the same time)Customer Limit (Login required, Depend on customer tags, quantity each)