Unit Converter Pro allows you to add your custom categories You can add, modify or remove your custom categories in this dialog.
Custom Categories Dialog
(click on the area of your interest)
Add button
Displays the Add
Custom Category dialog, where you can add a new custom category.
Add Custom
Category Dialog

Fill in only a name of new category. You must choose a unique name.
Rename
button
Displays the Rename
Custom Category dialog, where you can rename the selected category. This dialog
is analogical as the Add Custom Category dialog.
Remove
button
Removes the selected
custom category.
Units
button
Displays
the Custom units dialog, where you can manage units
of the selected category.