42% of 26 verified owners recommend the Oral-B iO Series 9, based on real owner verdicts aggregated from Reddit, enthusiast forums, and YouTube.
Affiliate blogs here say 100% recommend, while the owner-based score is 42%. They earn a commission on every sale — so we show them for transparency but never let them move the score.
The headline score reflects owners (Reddit, enthusiast forums), independent lab tests, blogs with no affiliate links, and YouTube owner-comments when they line up with owners. YouTube and Affiliate blogs are shown for perspective but kept out here — hover the i for why.
Synthesized from what Oral-B iO Series 9 owners say — not a spec sheet.
Retailers' own star averages, for comparison — separate from our vetted owner-verdict score above.
“I find it crazy that the charging case isn’t USB-C”
“but it's value to my oral health has been inexpressible and absolutely worth every penny that was spent.”
“I see now that the battery still goes down really fast. I would not go on a trip for more than a few days w/o the charger.”
“This toothbrush is scary on intense clean”
“The oral b series 9 spins so much faster than my cheap Amazon electric toothbrush.”
“I highly recommend getting series 3 and saving your money!”
“The product is great but the thing i hate is how to brush is prone to getting mouldy.”
“I have 3 toothbrushes of the new models, and all of them had a problem with the battery in a short time”
“Great toothbrush.”
“I have no interest in the App or the various modes - total BS”
“I've recently bought the IO9 and it is crazy brilliant.”
“the battery will stop charging”
“Excellent toothbrush, but refill are more expensive than my older Genius X.”
“the product is OK for what it does.”
“Not having usb-c on the travelcase was the reason i want with a phillips”
“I have the io10 best.”
“Mine did not work after two years, just after the warranty expired”
“I bang my brush head in the sink and black mold chunks come out from all crevices. It's so disgusting that I put that in my mouth.”
“I have really sensitive teeth so this brush is really good for me”
“Overall though a very good brush.”
“I've had the iO Series 9 since 2023 and I can say that the battery life on these things are garbage”
“Worth it in my opinion”
“it was BLACK inside. Like not spots or chunks. It was completely covered. I almost threw up.”
“I agree I've had this issue with the IO9 also, it slipped out of my hand into the sink”
Practical notes owners raise — setup, quirks, and issues to watch for. They don't say whether the person likes the product, so they're not counted in the score, but they inform the pros, cons, and who it's for.
“I have had an IO series 9 brush at my home and have dropped to approximately 30% remaining battery with only 12 brushings.”
“i just bought it and its not connecting to the app its just detecting it.”
