Android and iOS application using flutter.
2 circle buttons on the screen. Corresponding 2 projects.
There should be database with 2 tables: project and time intervals
Buttons first line - project name, buttons second line - sum of all time intervals. Only one button may be pressed.
When user presses the button, button change appearance as pressed and second line shows only time from the current interval, if second button was pressed then it should be unpressed and second line shows sum of all time intervals.
When user presses the button second time then button change appearance and second line shows sum of all time intervals.