How do I add or edit categories?

1. Tap your profile picture in the upper left corner of the app to enter the side menu
2. Touch a category to expand it
3. Touch the + button to the right of 'General Category'
   
4. After specifying the desired category name and color, touch the check mark in the upper right corner
   
   
   
5. You can edit it by touching the gear-shaped settings button to the right of the category.