Smart toothbrushes have been around for a few years now, but they haven’t quite caught on. Sure, they promise better habits via connected sensors, but they also tend to be very expensive ($100 and up) ...

The Hum by Colgate has an excellent smart app that guides your brushing. Unlike many other electric toothbrushes, the Hum vibrates rather than rotates, providing a different, more gentle experience.

Colgate’s new iPhone-compatible smart toothbrush promises to transform the way you brush your teeth, thanks to the magic of machine intelligence. So is the E1 Smart Electronic Toothbrush With ...