The app allows you to create an estimate but you cannot turn an estimate into an invoice. There is no way to track estimtes versus approved estimates, Creating estimates and invoices is clunky and you cannot estimate hours with a rate and have it automatically calculate the total. This thing is three separate apps: estimating, invoicing, time tracking. They do not integrate with each other. Pure stupidity. Further you have to pay to synch between devices ($30 for 6 months) on their own cloud which is criminal considering the whole point of apple apps is to use the cloud. I didn’t test it out with dropbook. The manual was bare bones at best. The only good thing about it is that the standard estimate and invoice layout is not hideous like most of invoicing apps. The search continues….