Shopify is not responsible for this app.
Use inStock to update inventory in bulk. Receive stock from vendors, perform stock audits, and more. inStock tracks changes to stock levels so you know what's happening and who made the updates.
inStock has just relaunched with a new and improved architecture and infrastructure. inStock is currently in a free beta period until all the bugs are worked out. Please give inStock a try and suggest any improvements you may have.