A built-for-baldness rotary shaver manages the curvature of the head ... Apparently these sensors will adjust their intensity based on how thick your whiskers air, or how patchy, etc.

Rotary blades, meanwhile, have circular, spinning blades, with handles that help you adjust to the curves of ... when Philips ...

Foil razors work best with stubble, for example, where longer hair demands a shaver with a rotary head. To find the best electric razors — both foil and rotary — I spoke to 16 grooming experts ...