Best practice font for information heavy web applications

1. What is the best font size for web application?
2. What font size is good for practice?
3. What type of font should be used for text intensive documents?

What is the best font size for web application?

Optimal font sizes for desktop

Body text - Font sizes should be around 16px to 18px for legibility (or 1.6rem to 1.8rem using our sizing rules mentioned above). If you can afford to go a bit larger, then even 21px can be pleasant to read.

What font size is good for practice?

Size. Choose a font that's at least 16 pixels, or 12 points. If many of your users are older adults, consider using an even larger font size—19 pixels or 14 points. A small font size is more difficult to read, especially for users with limited literacy skills and older adults.

What type of font should be used for text intensive documents?

Serif typeface is used for text-intensive documents because serifs help move the reader's eyes across the page. A sans serif typeface is used for headings, headlines, advertisements and text that will be read on a monitor.