What's the best app for tracking raw materials and product options?

Shopify Apps
1

Hello,

I would like to offer more add-ons ( product options) to products but most of the app can’t seem to do the following:

PRODUCT OPTION APPS

  1. Allow customer to choose the number of same add-on products, eg: to check out 2 same add-on in one transaction. Most app can multiple select different add-on.
  2. Allow me to set the inventory of the add-on
  3. Sync the inventory of the add-on across all products that are tied to the add-on

Also, please give me some suggestions on the following,

RAW MATERIAL APPS

  1. Best app to track raw materials needed for products, i have a large inventory