excel to mobile app

What is the best way to do a one time impact of a 3 tab excel worksheet with calcs to create a mobile app for iPhone and Android? Thanks!  
1 answers

The best way is to create a story describing the entities, the calculations to be done, other specs you can think of like *need data-import or not, *need distinctive roles or not, *Will Native do? and don’t forget the acceptance criteria. Have a scrum team of 7 professional Business developers, who have been working together for at least 6 months, refine the story and then have them give it story points.