Supermarket Helper is a free application developed for smart phones running Symbian S60 operating system in its fifth edition (v5). Examples of mobiles with this operating system are Nokia 5800 XpressMusic and Nokia N97. Its mail goal is to assist in the creation and use of shopping lists. Its operation focuses on the practice, and is based on the building of a list of articles, which can be individually marked as “necessary”. Once in the supermarket or shop, as the needed products are carried they can be unmarked in the application.