Each day on the calendar will show your Total Earnings (top number) and Average Hourly Earnings (bottom number) for that day.
All Earnings (includes all income fields)
Average Hourly Earnings = All Earnings / Hours
If you track expenses or Paychecks these are also included by default. Please use the Filter (top right icon) to configure these settings
You can change these fields on the settings page by tapping the More tab, then Settings, then all the way on the bottom select Field to Display On Calendar.