Zkool currently has two report charts^[1]. Open them with the "Charts" option of the account page menu. Both of them can be limited to a given time period with the "From" and "To" dates at the top of the page.

Income/Expense By Category

This is a donut chart that shows your total of income or expenses by category, with a legend of the amounts and their share. Tap on a slice, or on its legend entry, to bring it forward.

• Switch between Income and Spending with the dropdown.

The eight largest categories get a slice each; smaller ones are summed into "Other".

Category by Time

Given a category, this chart plots your spending (or income) on a time axis, one point per transaction. Touch a point to see its date and amount. If the cumulative box is checked, it shows how the total amount in the given category grows over time.