As smartphones are going universal, the quantity of downloaded applications (App, apps, or APP) is rocketing. How to classify applications by page has been the major concern facing users. However, most cellphone-related designs are at the service of young generations, ignoring middle-aged groups who use cellphones at increasingly higher frequencies. This study, through literature review, focused on three paging styles relatively more suitable to middle-aged users: leading paging style, scrolling paging style, and folder paging style. We adopted an ANOVA repeated-measure experimental design. Subjects took three repeated-measure experiments on paging styles, in order to discuss the three paging styles with respect to usability. Subsequently, we proposed the design on smartphone paging style. The findings indicated that, as far as middle-aged users are concerned, of the highest-usability is the leading paging style, followed by scrolling paging style and folder paging style respectively.