Radio button best parttern in mobile app

1. Which is better radio buttons checkboxes?
2. Should radio buttons be horizontal or vertical?
3. What should be the size of radio button?

Which is better radio buttons checkboxes?

When should you use radio buttons or checkboxes? This relies entirely on what question you are asking. If you want your users to select multiple options, use checkboxes. If you want your users to select only one option, use radio buttons (or another alternative).

Should radio buttons be horizontal or vertical?

Vertical positioning of radio buttons is safer. Radio buttons are tiny in nature, and, thus, according to Fitts' law, they can be hard to click or tap. To enlarge the target area, let users select an option by clicking or tapping not just that button, but also the label or associated words.

What should be the size of radio button?

change a radio button's default size (32px on desktop and 36px on mobile, with a hit area of 48px for both)