Numbers is a featured app because it is a powerful, yet intuitive spreadsheet app. ¬†Over 250 functions allow users to create complex spreadsheet calculations for almost any task. Import Excel and CVS spreadsheet files to convert and edit. Pop-up menus, sliders, and steppers make enter data quick and accurate. Automatically save” data as it is entered. ¬†Export Numbers spreadsheets as Excel, CVS, and PDF files. Numbers is a paid app that works on an iPhone, iPod touch, and iPad.