Your Harvest export, read exactly.
Export from Harvest with your API key and drop the files in. Decent Billing recognizes a Harvest export on sight and reads it exactly: every invoice, every payment with its date, every project by its code. A history of a thousand invoices comes across in seconds. See how the two compare.
Clients, invoices, payments, balances, hours.
The import shows you exactly what it found before anything is saved: invoices with every line, payments matched to them, unpaid invoices carried forward as open balances, hours matched to projects and people.
Your old data comes with you.
Coming from Monograph, QuickBooks or a spreadsheet? Drop in the export, or the PDFs of your past invoices. The importer reads them, groups invoices by client and project, and shows you what it found. You confirm, then you are invoicing.