Android methodology development

We are looking for someone who is good in writing skills that is know about agile methodology. In short we are looking for someone that able to describe in great details and choose what is the best approach for the a mobile application methodology is. There are a lot of methodology out there such as RAD, Sprint, Scrum, Wataterfall etc so if anyone could explain only one of this that suit our development then please contact us ASAP. This project doesn't need long and lot of pages but between 1-2 is good enough. Please contact or message me if anyone could do this project right away.