Simple Invoice ‑ Order Printer

Simple setup and clean format. I can choose various font. It also provides three manual options: Print, Download (pdf) and Send email - in each order page.
Also simply put a link to 'download the invoice' to the 'shipping confirmation' email and SMS format and people who need the invoice can receive the invoice themselves.
Besides, it's free! There's no reason not to use this app.
Thank you so much for providing this PERFECT APP!