Thanks for your answer.

Just one question. How the aplication upgrades?

I am new on iPad and apps store and do not know if patches exist or apps automatically updates.

I try to select a category to be show in a bar chart but when do it the chart do not show any figure. I activated the show only category option on preferentes and category selection screen show all categories I created but a category called none is allways selected. When selecting once the screen ...

I could organize categorices into groups with your explanation.

Many thanks.

Could you explain how to create sub-categories?

I can create a new category and upgrade it to group, ten it creates a group and a category with the same name. I am confuse about groups.

Many thanks for your time.