Too Long; Didn't Read
A UX Designer based in Frankfurt, Germany, created a free accounting software called Wave accounting. The app does not support the bill upload feature even as it supports receipt upload. For non-accountants, a bill is an invoice from a supplier normally payable after a given agreed period of time while a receipt is a document you receive when you buy goods or services in cash. The design was purely based on my experience as a user and later on, as a designer using the app on my 14-inch laptop screen and the experience of people in my circle.