Billy

About

Billy is a Mac invoicing app made for freelancers and small businesses who want their paperwork to be organized and attractive. It is fully compliant with the EU standard EN 16931 and the German XRechnung standard, and exports are valid e-invoices, which the site notes will be required in Germany starting no later than 2028. Following a "file over app" motto, Billy stores all data in the non-proprietary JSON format, and invoices are kept in your Mac's file system, so you control where your data lives and how you work with it.

Billy covers the full invoicing process, from first draft to paid invoice. It offers status tracking with clear indicators, multiple profiles that each have their own invoice number sequence for separate activities, and invoice styling options such as colors, fonts, and layout so you can give invoices their own visual identity while keeping them readable and professional.

Reviewers praise the app's whimsy, attention to detail, custom iconography, and its feel as a classic Mac app, and say it is a welcome alternative to over-complicated invoicing solutions.