Calandar APP

I want to create a simple application with a calendar were you can add shift patters on it which include set times and breaks i.e. 9-5 shift with 30 mins break etc (must be customisable by the user) and a tab where you can see the weekly / monthly / yearly graph (stats) of the hours you worked and breaks you had, also must be able to sync friends/family calendar to your with their permission. What does it do? It stores all you timetable the way you want I.e it has pre-set time (which you create) such as day 9-5 with 30 mins break and can then insert that anywhere on the calendar and you can further customize it by adding different times What Smart Cal because it creates a graph where it adds up all the hours you work in a week and all the breaks you had furthermore you can sync 2 calender's such as husbands and wife's this way it will make it easier to find time off Main features ●can add your own pre-sets (the shifts you work and the breaks you get) also customise the colour of the shifts ●Creates a graph of the hours you work in a week month year etc infinitely ●calendar can be exported anywhere or shared ●can add sound notifications ●totally free with no in app purchases ● to do list with notification option ● be able to share a snapshot of your week month to a friend ● sync husband's and wife's calander and get day off notifications. ● must have widget for android