Flutter app journal

Hello I like the app Diarium with its calendar
1- works on Google and iOS
2- later we can windows and MAcOS
3- user can add journal diary in typical typical. Or can do mindmap like Mindomo
4-user can record important dates and see count from day 1 like pic attached and can be categorized like personal and business
5- user can sketch freely
6- user can add photos and videos to the journal or bubble of mindmap
7-sync with multiple options like pic
8- pic atlas to show ceo locations like pic attached
9- ability to charge monthly yearly and lifetime


For good reference check Diarium and Mindomo