Making an android app for my company

I am taking a stock market franchise and i would be opening demat account of my customers and would trade on their behalf in their demat accounts. I want an app to be designed where all my registered customers (who already have a demat account with my company) would have a username and password and when they login into their account on our companys app, they would be able to see how much profit or loss has happened in their demat account on a daily basis. (Eg. I want a calender type of format and just below each date would be the profit or loss percentage for that particular date.) This data would be updated on a daily basis by my back office team in a excel format and it can then be uploaded onto the app on different customer ids (Usernames). This is the main work which i want and once this type of structure is in place then i want a few more add ons like there would be flash messages kind of update that would be sent on a weekly basis to all the customers mobile phone who have installed the app (just like flipkart sends notifications about a sale which is about to start). I have attached a .xls file which has a workflow of the app. this would be the basic structure and rest of the things would be added later. Hope i have tried to explain myself with what i want.