Five steps. No spreadsheets. No manual sync.
Add Assembly Line Pro from the Shopify App Store. It installs directly into your Shopify Admin — no external login, no separate dashboard to manage.
Build your raw materials catalogue: SKU, name, unit of measure, and starting stock level. Import a spreadsheet on day one or add items individually.
For each Shopify product variant you assemble, define its BOM — which raw materials it needs and how many per unit. One variant can reference dozens of materials.
Click Publish. Assembly Line Pro calculates each variant's sellable quantity from your material stock and writes the correct numbers to Shopify. From this point, every stock change triggers an automatic recalculation.
When an order arrives, Assembly Line Pro automatically reserves the raw materials needed. Pre-assembled stock ships first. No manual tracking, no overselling, no spreadsheet updates.
Raw material reservations prevent stock conflicts the moment an order lands.
Every variant reflects real buildable quantity — calculated, not estimated.
The BOM engine handles all calculations automatically on every stock change.
Free plan available. No credit card required.
Install App →