NeoInvoice has finally been shut down. Scroll down and look through the Related Posts if you would like an understanding of the history of the project.
UPDATE: If you love this project, I am now accepting donations.
This video is of me going over the features of NeoInvoice. This is just in case the project is never built again, I’ll still have a copy of this video to describe how everything worked. Below is a bunch of screenshots of the different features the app has to offer.