Open the invoice generator and you land on a form: your business, who the invoice is for, the lines of work with quantities, prices and VAT, and any notes. The invoice on the right updates as you type. When it looks right, download the PDF.
If you would rather describe the job, switch to the AI creator and type it the way you would say it out loud - "Invoice John Smith 2400 for bathroom installation, due in 14 days" - and the invoice writes itself. You can keep chatting to change anything: add a discount, change the due date, add your bank details.
Trying it needs no account. Downloading the PDF creates a free account so the invoice, your business details and the customer are saved for next time; the next invoice takes one line.