QSalesData will keep your QuickBooks and act data synchronized if you set up a nightly transaction synchronization with Act.
At the bottom of this post you will find a video that shows you how to set up a nightly transaction sync between Act and QuickBooks. One of the great things about QSalesData is that they offer fantastic customer support. If any of the items here that intimidate you at all, simply reach out to them for assistance. They are very accommodating.