An IPad stylus is best for designers or people who use their iPads to takes notes, as using a stylus to type is much faster than with fingers.

Good stylus devices have great sensitivity, and sensitivity is most affected by the quality of their tip. Rubber nibs are preferable over fabric and mesh nibs as they last longer.

You probably need Bluetooth styluses. They are very expensive and not worth that cost for just a few extra features.

The best iPad stylus: Adonit Jot Pro (precise plastic disk tip, gives an almost pen-like experience)

The second best /  most affordable iPad stylus: Adonit Jot Mini Fine Point

The best stylus for iPad Pro users: Apple Pencil for iPad Pro (expensive)

The best rubber-tipped stylus for iPad: Sensu Artist Brush & Stylus (great for note-taking, drawing, etc)

The best iPad stylus for kids: Cosmonaut

The best stylus with mesh nib: Lynktec TruGlide Pro Universal Stylus

The second best stylus with mesh nib: BoxWave EverTouch Capacitive iPad Stylus