App for Quickbooks and SquareUP

I need an app that will reside on the PC that Quickbooks Desktop is running on. This app will fetch the inventory list from SquareUP account and import this inventory updating what was already in there. The app needs to be run manually so that the end user can see the changes that are being made. It would be nice if the app would fetch the items, compare them to what is in Quickbooks DESKTOP and then give a list of the changes that will be made to the Quickbooks database. This way the customer can confirm what is going on