Why do my invoices start with “1-“? Can I change the initial invoice number?

The “1-” means you’re farrier number 1 on your subscription. This was necessary to allow for the development of a future multi-farrier version, so people could move their invoices over and the invoice numbers wouldn’t have to change.

As far as changing the starting number, that’s not possible at the moment for the same reason. On the other hand, the new invoice numbering with the “1-” prefix lets you know those invoices are from the Best Farrier app, as opposed to invoices from any other app you used before, which can help tell them apart during the transition period, until all the invoices on your old app are paid off.