Mobile application that plays music files from 7 categories randomly. IOS - Andoid and Windows mobile

Playback Application We need to develop an application that plays instrumental sounds to relax people. We need to consider some basic things before go to the basic operation. The background images of the application is about oriental culture, like relaxing environments, we can think the possibility of choosing between 3 themes, and leave the option to upload new themes. The songs are going to be hosted in an internet server (for example [login to view URL]) the average time of the songs are 15 minutes. There is going to be 7 categories of the songs: 1) Peace 2) Sleep 3) Rest 4) Yoga Meditation 5) Relax 6) Vitality 7) Fly (On the center of the screen We need to identify the number of times a song is played. The songs are going to be choose randomly over a category from the songs the user hasn`t played. SCREENS 1) The first screen is going to play a short song in loops (never stop) this song is going to be on the application not over the internet. It`s going to have a logo on the center and a fingerprint panel that invite people to put the finger on to continue to the next screen. 2) The second screen is the main screen. In the top left of the screen will have a volume control. In the top right will have a button to put the cellphone on flight mode. (if user stop the app or go to the first or last screen the flight mode it will turn off) On the center of the screen it will be the 7 categories. At the bottom left it will have a fingerprint pad to go back. 3) The third screen it will have the playback of the song. And it will show a progress bar. At the top of the screen it would say ABOUT and a space to have some sponsors with their logos. When the song has finished to play it will appear a five star that invite to give their opinion about the song and to share it in social networks. Again At the bottom left it will have a fingerprint pad to go back. In this screen we need a link bottom to go to the app webpage. Tables and backend We need to store the user’s information, songs played and feedback. At the backend we need a webpage where we can upload the songs choosing the category. Maybe a table where we can have the language information. We can have sponsor in different countries so we can upload short audio files that it will played before the songs are played. So before a song is played it will choose what file needs to be played knowing the country.