It is not possible to book your expenses, purchase invoices or handle your accounting in Zervant.
With Zervant you can create and send invoices for free. Beyond that we also have premium services that will improve your overall invoicing experience and help you to get paid faster. You can read more about those here.
You might be surprised to see the mentioning of “expenses” in the sales report (Reports -> Sales report). This is a leftover from our old product and we will remove "expenses" from the report soon.