Basic Functionality: Because they act as a finger substitute, most basic universal styluses offer limited advanced features. They typically do not support pressure sensitivity, tilt recognition, or palm rejection, which are features often found in specialized, brand-specific active styluses (e.g., Apple Pencil, Samsung S Pen).
Precision and Scratch Protection: They usually have a soft rubber, conductive foam, or a fine disc tip that allows for more accurate input than a finger and protects the screen from fingerprints and scratches.