QuickBooks seems to be a very overcomplicated system, especially for simple tasks, it takes 4 different windows to print an invoice on the computer for example The mobile app doesn't allow you to do half of the jobs you want to including checking stock levels and costings of items, it also won't let you do a report/see the history on an item. The system tries to autofill 99% of the time with the wrong information meaning you have to start again which is very frustrating