How do you connect Profit Calc with multiple Shopify stores?

Yes, it can! To use Profit Calc with multiple stores, each store would have to have Profit Calc installed. Each store would need its own subscription as each store would need its own setup (e.g. access token, product database, order database, ads login/connections, API access).

To connect your stores:

This can be done using email confirmation on the Connect Stores page here

Steps to link two (or more) stores:

1) You'll first need to grab the "Store ID" of the 1st store you're trying to link. This is a unique ID generated by Profit Calc. Copy this ID.

2) Next, log in to the 2nd store you are trying to link and paste the 1st store's ID, and then press "Link New Shopify Store"

3) If successful there will be an alert in the top right. You will then receive an email to the 1st Shopify store's email address. Clicking on the "Click Here to Confirm" link will link them together.

Also to note with the multiple store settings:

Each store can be selected individually or viewed together under "All Stores" under the Analytics sections. 

The currently logged in-store is displayed in the top left of the sidebar menu. The settings will only show for this store. To change stores, select another one using the selector in the top left.