How effective using Combo Box in Mobile App UI?

1. Why do we use combo boxes?
2. What is a combo box in UI?
3. What is the difference between drop-down list and combo box?
4. What is difference between list box and combo box?

Why do we use combo boxes?

When to use a combo box. Use a combo box when you want to: Enable users to either select a predefined value from a list of choices or type their own value. Hide list items on the form by default.

What is a combo box in UI?

A combo box is a commonly used graphical user interface widget (or control). Traditionally, it is a combination of a drop-down list or list box and a single-line editable textbox, allowing the user to either type a value directly or select a value from the list.

What is the difference between drop-down list and combo box?

A drop-down list is a list in which the selected item is always visible, and the others are visible on demand by clicking a drop-down button. A combo box is a combination of a standard list box or a drop-down list and an editable text box, thus allowing users to enter a value that isn't in the list.

What is difference between list box and combo box?

Generally, a combo box is appropriate when there is a list of suggested choices, and a list box is appropriate when you want to limit input to what is on the list. A combo box contains a text box field, so choices not on the list can be typed in.