iO Series 9 Electric Toothbrush

Let's be honest about who actually needs a £350 toothbrush. Not the guy who brushes for 45 seconds and calls it done — he'd be wasting the technology. The iO Series 9 is for the man who has clocked that his smile is one of the highest-leverage aesthetic variables he controls, and wants the most defensible daily tool for maintaining it. Clean teeth, healthy gums, less staining: none of this is vanity, it's just basic not-sabotaging-yourself energy. The looksmaxxing community calls this a softmaxx lever, and for once, the community is right.

What the iO Series 9 actually does is apply oscillating-rotating-pulsating magnetic drive technology at 40,000 micro-vibrations per minute, paired with a pressure sensor that lights up red when you're grinding into your gums like you're settling a grudge. Oral-B's own clinical data claims 100% more plaque removal versus a manual toothbrush and a 50% improvement in gum health over eight weeks. Those numbers are from Oral-B's trials, so apply the usual corporate discount — but independent dental literature does broadly support powered oscillating brushes outperforming manual on both metrics, so the direction of travel is real even if the exact figure is optimistic. The colour display tells you which zone of your mouth you're in, gives you a 2-minute timer with 30-second quadrant prompts, and scores your session out of ten with the kind of quiet judgement that would normally cost you a therapist's hourly rate.

Performance-wise, the iO Series 9 sits at the top of the Oral-B range, trading directly with the Philips Sonicare DiamondClean 9900 at comparable price points. The Sonicare uses sonic vibration (31,000 brush strokes per minute in a back-and-forth motion) versus Oral-B's oscillating-rotating action. Clinical consensus is roughly split on which mechanism wins, but most dental hygienists lean toward Oral-B's method for plaque at the gumline specifically — the rotating head gets into sulcular spaces more aggressively. The iO9 also has seven cleaning modes versus Sonicare's four, though realistically you'll use two of them. Battery life runs to two weeks on a charge, which is more than sufficient. The magnetic charging dock is satisfying in that unnecessarily premium way that justifies nothing but feels like something.

Cost is where this gets uncomfortable. The iO Series 9 retails between $150 and $220 USD depending on the bundle and retailer. Replacement brush heads run $10-15 each and Oral-B recommends replacing them every three months, so the ongoing cost is meaningful. The Oral-B iO Series 4, at roughly $70, uses the same magnetic drive technology and the same oscillating head — it simply lacks the AI coaching display and some of the premium modes. If the screen and session scoring aren't features you're going to engage with, the Series 4 gives you 80% of the performance at 40% of the price. That's not nothing. However, the Series 9's pressure feedback and real-time coaching are genuinely behaviour-changing for people who have spent years brushing incorrectly — which is most people.

Jamie's verdict: the iO Series 9 is not cope, but it is premium-cope-adjacent if you buy it and then continue brushing badly. The technology is legitimate, the data supports powered over manual, and your teeth are irreplaceable in a way your moisturiser habit is not. Spend less on the brush head accessories kit Oral-B will try to bundle you into, and actually use the pressure sensor feature instead of ignoring the red light. This is one of those rare cases where the expensive version of a mundane product is doing something meaningfully different, rather than just being a different colour and charging you for the privilege.