Write an Android Application to integrate with user's Google Fit

I will need a mobile developer to build an app that can connect with user's Google Fit and display today's steps taken. Apps' features: I would also need the app to display history of user's total steps taken since the time he joined. On launch, the app should fetch details on today's steps , kCal and km walked today. On scrolling down, the app should display the last 7 days' activity, day by day. On scrolling further, the app should display all the steps since app's first install. I am not concerned about how the app looks like, just capturing the info and displaying them as part of TextView should be good enough. The inspiration of the app is [login to view URL] But, I do not want any of the charts / achievements integrated. The only thing that needs to be implemented is the number of steps /kCal /km user has taken for each date. Apps' future: This would become a gamification app based on the fitness data and expected to be a long-term one. A more of social walking app with specific achievements for each user. From the developer: The applicant is expected to send me an estimated number of hours required to perform this work. I would prefer to go fixed price for this activity and add newer features month on month.