These could be anything you wish and this is why we advise publishing an elementary version initially to go live, followed by any honing en route. Such a staggered approach is known as a ‘minimum viable product’ (MVP). This is based on the presumption that you’ll only ever expose and scrutinise as well as gauge an app upon testing it under actual conditions. An initial lightweight version can check this and determine the necessities in the future, hence improving efficiency by minimising wastage.