Every Shopify inventory app we compare, side by side, on the questions merchants ask most: what it costs, what the price is based on, whether it tells you what to reorder and shows you why, and whether it handles purchase orders and true unit costs. Facts come from each app's own listing or published information, checked October 1 to 3, 2026. Prices change, so check each listing before you decide, and click any app for the full comparison.