It allows to run price recalculation and restocking of the products, provided by suppliers.
Initially you would need to upload suppliers' price-lists through Suppliers app, then create the rules of margin and price recalculation in the current app.
OneBox will recalculate the prices and stock for every product in real time.
It's a complex technical app with a high number of logics and conditions, but to simplify its logic can be described as follows:
The app works in real time in OneBox OS, you do not have to run the price and stock recalculation in the background.
You can create a lot rules for setting margins and defining suppliers.