Cashierless stores are created all over the world in a variety of formats and in different industries; they make use of the newest technological developments to eliminate the traditional check-out process. For each of the four defined phases of the purchasing process (preparation, check-in, product selection, check-out), the available technologies can be combined and applied in different ways. The opportunities for stores range from cost reductions to higher convenience to a potential refocusing on the customer. Satisfying customer needs, however, remains the main objective.