The E1 vibrates but does not oscillate, and does so more quietly than most electric toothbrushes we’ve tested. The Colgate Smart Electronic Toothbrush E1 also uses on-board sensors and “artificial intelligence” to track the brush head’s location as you move it around your mouth. Still, we would not recommend that most people pay considerably more than the cost of our picks for this (or for any other) smart toothbrush. And the brush head location tracking was, in our limited experience with the device, accurate. Predictably, brushing with it feels high tech: The onboard digital display smiles at you. It runs much more quietly than nearly every other electric toothbrush we’ve tested. 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).
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