# days can depend on requirements, could be less.
Android Consultant at eRideShare, Highline Residential, Bergen Chess Mates. Have a half dozen client apps published on Google Play.
I have experience with db and RESTFUL interaction and AChartEngine.
3+yrs experience with Native Android SDK, third party libraries, Data persistence, Google Analytics, Google In-App Billing, Admob, Material Design, Camera, Map api, Restful Api, GSON and framework libraries used to support production applications.
Testing of Android applications is a laborious task due to all the devices that exist. So if you see a low # days, it probably won't be tested reasonably.
In addition, Crash tracking, analytics and deep linking can easily be added to your app.