Make an invoice. Save the PDF. Nothing is uploaded.
This draws the same document the InvoiceWright app draws — the same renderer, the same four templates, the same money formatting. It runs entirely in this browser: there is no account, no email box, and nowhere for your figures to be sent.
What the app does that this page does not
This page has no memory. It will not remember your clients, keep your saved rates, number your invoices in sequence, turn an accepted estimate into an invoice, or keep a register of what you have sent and what has been paid. That is the whole difference, and it is the difference a second invoice makes you feel.
The app is a single payment. It is not a subscription, it has no account, and it works with no signal on a job site.