Actually there is another program that integrates QBO with your QuickBooks POS program.  Is listed on the Intuit market place. It works similarly to the desktop integration. 

Here is the link. https://quickbooks.intuit.com/app/apps/appdetails/qposconnect/en-us/

There are some large chain stores currently using it.  The programmers are also willing to make custom changes for retailers with special needs.