From mattresses to scales, it’s commonplace now for even the most basic products to be app-connected. Electric toothbrushes are one of the more curious entries in the “smart” device space. But, smart or not, toothbrushes serve one purpose: cleaning your teeth. The American Dental Association says both powered and manual brushes will lead to good oral health, as long as you are in the habit of brushing twice a day, for two minutes each, with a soft-bristled brush and fluoride toothpaste.