hello, how are you?
As I have not seen your application, I am talking about what could be done.
Float labels for fields
side menu based on the design material
improvement in item listing (maybe redoing lists)
if you use map, update the SDK, if you use push notification, switch from GCM to FCM.
Change the local bank and shared preferences to new SqLite or Realm API.
Update notification system.
Update the permissions system.
I would need a screen print, could you inform me, kindly. Or send the application to me to see (install).
On the down side, having full supply, would ask for 25-30 days, maybe less, it depends on how it is inside.