Assembly Line Pro handles the math, the reservations, and the Shopify sync — so you can focus on building.
Start free — Install App →Link any Shopify product variant to its component raw materials. Set the quantity ratio — “3 screws, 2 panels, 1 knob per unit” — and the BOM engine handles the rest.
Sellable quantity is always computed live from your current stock. No stale numbers. No manual recalculations. The moment a material changes, every affected variant updates automatically.
The moment raw material stock changes — a receipt, a sale, a manual adjustment — Assembly Line Pro recalculates every affected variant and pushes the update to Shopify. No polling. No drift. No overselling.
When a new order comes in, Assembly Line Pro first deploys your pre-assembled stock. If that's not enough, it reserves the raw materials needed — so two orders can never claim the same components.
Every affected variant's sellable count updates instantly. What Shopify shows is always what you can actually ship.
Finished goods inventory ships before raw materials are consumed. Fastest path to fulfilment.
PostgreSQL transactions ensure two orders can never claim the same materials simultaneously.
Track raw material stock per Shopify location. Sellable calculations always reflect your real, location-specific inventory. Available on Growth and Pro plans.
Four template types: raw materials, stock levels, BOMs, and assembled stock. Client-side preview before any data is committed. Import on day one, export any time.
Connect your own Google account. Assembly Line Pro creates a spreadsheet in your Drive with four pre-formatted tabs, kept in sync bi-directionally.
Free plan, no credit card. Up and running in under a minute.
Install App →