I would like to suggest the developer that when we decide to group the expenses by category, its could be better you it happen only with the main category and not the subcategory (as it is done today). Additionally, could be really useful if the chart view we can select to see the expenses per month for a specific category, today its not possible, its only a percentage view.. (Why?). . (For instance, if you have a utility/energy, you can see how it goes along the year, check tendencies, etc.