Screenshots of the real product, not drawings of it. Pick the business closest to yours and step through what you would actually be looking at day to day — on a computer or on a phone.
The figures are made up; the screens are not. This is the same Billi you get on day one — the sample business is just there so the screens are not empty.
Want to press the buttons yourself? Start the 30-day trial — it is everything in Business, and there is nothing to uninstall if you decide against it.