Bundles.app ‑ Inventory Sync

This did exactly what I needed and exactly what they said in the description.

If you already have a product set up that comprises a number of other products, this app will handle inventory management for you. Every time you sell the bundle product it will update the inventory of the products it contains. It is super simple and super easy - I installed it and had two bundles up and running in less than 5 minutes. It couldn't be easier and they've made the interface really good.

Highly recommended

Bundles is an essential app for my gift basket business. It keeps all components, packaging, and elements tracked across multiple products. It also integrates with the Stocky app for inventory forecasting. Great email support as well!

I am utterly obsessed with trying new apps, and all I can say is... my god, I am so glad I tried this one out. This may be the single most useful app in the history of Shopify. I don't know how I lived without it. It saves me so much time!

This app is excellent in its simplicity and reliability. It has allowed us to merchandise our products in bundles while, importantly, keeping inventory in sync. Bundles are now very popular on our store and contribute a significant percentage of our revenue.