Allow not categorized expenses
Could it be possibly to add generic category, e.g. “(not assigned yet)” to the list of “Select category” for “Add expense”? Sometimes people doesn’t know what to fill/choose just want to add data. None category allows faster feeding with data, doesn’t exhaust psychologically when don’t know what to fill and change is always possible later on.
Expenses that have not been categorized during creation could be displayed under the not assigned yet category automatically.