
We briefly tested the iO at the January 2020 Consumer Electronics Show. Many other pricey smart toothbrushes and their apps do this, some better than others (read on). The idea behind this and several other smart toothbrushes is to provide you with an overview of which teeth you’re cleaning well and which teeth you may want to pay more attention to. It connects wirelessly to an app that tracks your brushing duration and brush head location within your mouth, among other things. It has an onboard two-minute timer and seven total brushing modes (six more than needed). Unlike other electric toothbrushes in Oral-B’s line, the iO is compatible only with iO-specific replacement brush heads, which cost $13 apiece when purchased in the most economical pack ( a set of three).

Like other electric toothbrushes in Oral-B’s line, this model has earned the ADA Seal.

The Oral-B iO is a very expensive smart toothbrush: It regularly costs $300 (with four brush heads-roughly a year’s supply-included).
