Home page: Boxes for login, “Tree Name,” etc, are nearly invisible so it’s hard to know where you’re supposed to click on to type. They need to be visibly outlined.
"Content Lists" dropdown: When you click on one of the four choices, the screen that appears needs to have its name appear as a label somewhere on the blue bar at the top. Because the dropdown closes automatically, it’s easy to forget which choice you clicked on and where you are now.
Person page: Typeface color for birth, marriage, and other events is light blue, which is awfully hard for some of us old folks to read. Consider having several color scheme options under settings that would include darker colors.