I miss an option to enter / show the birthday. This could then also calculate the age. This would, for reasons of data protection, the age displayable, but its the actual birth faded out.
As desire for the settings:
1) Display of the individual properties as table
2) show / hide a radio button or checkbox next to the label for more clarity
3) 3-5 generic property fields for example other hobbies, previous clubs
4) A Möglichkeitt the export of data
5) A link to a sample import file