Differences

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--- oralb [2026/01/13 18:04] – particles
+++ oralb [2026/01/13 22:56] (current) – particles
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 ====== The Oral-B iO Series 9 (IOM94K11ADWT) ======
-The Oral-B iO is a smart toothbrush that I paid 39,800 yen for (about $245, tax in). It is a toothbrush currently being marked as having "3D TEETH TRACKING with A.I." but which utterly fails to track whether or not I'm on the left or right side of my mouth. Ostensibly the AI means "it uses an IMU with glorified fuzzy logic to select which side of the mouth you're brushing" but we can't just say this and ride the AI hype train.
+The Oral-B iO is a smart toothbrush that I paid 39,800 yen for (about $245, tax in). It is a toothbrush currently being marked as having "3D TEETH TRACKING with A.I." but which utterly fails to track whether or not I'm on the left or right side of my mouth. Ostensibly the AI means "it uses an IMU with glorified fuzzy logic to select which side of the mouth you're brushing" but we can't just say this and ride the AI hype train. I switched from a [[sonicare|Sonicare DiamondClean Smart 97xx series]] which also has terrible tracking (but, plausibly, not AI).
 I'm here to tell you that while [[https://pubmed.ncbi.nlm.nih.gov/34877772/|multiple]] [[https://www.sciencedirect.com/science/article/pii/S0020653923001004|studies]] (summarized by multiple meta-analyses) show that Oral-B's spinning-type toothbrushes (particularly, the "ultimate clean" heads) beat out manual toothbrushes as well as sonic type toothbrushes (like Sonicare), the teeth tracking features aren't worth it.
-Being practical if you want to buy a good toothbrush, you **probably** benefit from just getting an IO Series 2 ($65 before tax) or Series 4 ($99 before tax, includes travel case) or you might even be convinced to get the travel charging case but this requires you to move up the product lineup to the Series 9.
+Being practical if you want to buy a good toothbrush, you **probably** benefit from just getting an IO Series 2 ($65 before tax) or Series 4 ($99 before tax, includes travel case) or you might even be convinced to get the travel charging case but this requires you to move up the product lineup to the Series 9. Of course, you can get an aftermarket USB charging dock that you can throw in your suitcase for like $20, so maybe that's not economically rational.
 In any case, to be pragmatic about this, you do want the ultimate clean brushes for maximum efficacy and maybe you want to get a charging travel case so you can travel with it.
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 But seriously? $245 and not even a decent travel case that uses USB-A? Let alone C?
+===== Brush head life =====
+[[sonicare|Sonicare]] brushes track their usage using NFC and alert you when they need to be replaced. Oral-B relies on a color changing brush head or an app estimation of life based on 2 cycles per day. To each their own.
 ===== AI toothbrush? =====
 Lol.