Keystone Inventory turns your Shopify sales data into clear ordering decisions. It tracks how fast each product sells, factors in your supplier lead times, case packs and safety stock, and tells you exactly what to reorder and when — before you run out, without tying up cash in overstock. When it's time to order, select the products and Keystone builds purchase orders grouped by supplier. Authorise, send, and receive deliveries — accepted stock is pushed back to your Shopify inventory.

• Keep your best sellers in stock.
• Purchase orders — create, authorise, send, receive with Shopify stock push-back
• Your whole inventory at a glance
• Demand forecasting — reorder points, days of cover, suggested quantities
• Per-product cost, supplier, lead time, case pack and target-cover settings