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The iO Series 4 is at the cheaper end of Oral-B’s range of smart electric toothbrushes. It’s full of features, such as smartphone compatibility, extra brushing modes and a pressure sensor. Can this smart electric toothbrush clean your teeth a lot better than less expensive models or is it a waste of money? Find out in our full review.

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What's included?

  • What is it?
  • Does it do a good job of cleaning teeth?
  • What’s the battery like?
  • Is it comfortable and easy to use?
  • Is there anything I should watch out for?
  • Should I buy it?
KEY TEST RESULTS
Cleaning performance
Battery performance
Ease of use
  • Feb 2024Last checked by Which?
  • Jan 2023First reviewed by Which?
  • May 2022Released

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