I am considering using quick books on line. A HUGE reason NOT to use it follows here, am I missing something, is there a solution offered by quick books?

I work in the field and sometimes have no internet connection. As far as I know there is no way to use the mobile app for quotes, invoices etc. if there is no internet connection.

An off line mode that allows simple everyday business to proceed with my customers is needed.

It could sync later when the internet is available. 

I could only find discussions on this subject that are a few years old and it's a real problem for on the move small businesses. Has quick books solved the problem.

I can't see myself buying a product that won't work when I need it the most.