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The Colgate Hum app is a big part of using the toothbrush. After all, it’s a smart toothbrush. So being able to see data around how and when you brush makes it more than just an electric toothbrush.

But with a smart toothbrush, you can connect to a compatible app that lets you know your strengths and shortcomings when it comes to oral hygiene. As of Feb. 11, the hum by Colgate Smart Battery ...