The Oral-B iO Series 9 from Procter & Gamble Co. - quiet motor, pressure sensor and app coaching

Reviewed: ad hoc news B2B & Pro desk. Edited and checked on 2026-06-27, 16:35. Details in the imprint.

Oral-B iO Series 9 greets you with a soft vibration and a round brush head that hums rather than rattles on enamel. The handle feels satin-smooth in the hand, the tiny display flashes a quiet hello, and the built-in light ring waits to warn you if you press too hard.

What makes the iO tick

The Oral-B iO Series 9 is the current flagship of the brand's oscillating-rotating brushes, using a frictionless magnetic drive to move the round head at high speed while keeping noise levels down compared with older Oral-B models.

It offers seven brushing modes, from Daily Clean to Intense and Super Sensitive, and a color display in the handle that shows a simple timer, icons for each mode and even a smiley face when you finish the recommended two minutes.

Pressure sensor and live coaching

A 360-degree light ring at the top of the handle glows red when you press too hard and blue if you are too gentle, guiding you visually to the recommended pressure range. The feedback is immediate, so you feel a subtle nudge to adjust your grip instead of guessing.

Through Bluetooth, the iO Series 9 connects to the Oral-B app, which uses 3D tracking to show in real time which zones of the mouth you have covered and where you are still missing spots, turning the mirror into a kind of control center during brushing.

Battery life, charging and travel

In everyday use, the lithium-ion battery typically lasts around two weeks on a single charge at two minutes twice a day, depending on mode and pressure. A small magnetic charging puck holds the handle upright and feels more stable than the older pin-style stands.

The Series 9 bundle usually includes a hard travel case that can charge the brush via USB when connected to a power source, which frequent travelers like dental YouTuber Dr. Rhea Handa often highlight as a practical detail in their reviews.

Who Oral-B targets with the iO

Procter & Gamble oral care head Carlos De Jesus has described the iO platform as an answer for consumers who want "professional-level clean and personalized guidance" at home, positioning the Series 9 clearly in the premium tier of the mass market.

The feature set underlines that strategy: the included three brush heads, customizable welcome screen, and tongue cleaning mode are not essential for everyone but appeal to tech-friendly users willing to pay more for control and comfort.

Price point and availability

In Germany, the Oral-B iO Series 9 typically lists with a recommended retail price around 399 euros but regularly sells for less in retail promotions and online bundles, depending on color and accessory set.

The brush is widely available through German electronics chains and pharmacies as well as major e-commerce platforms, and it sits above the iO Series 6 and 7, which share the magnetic drive but skip some premium features to hit lower price points.

Where it still falls short

Despite the quiet motor, some testers note that the mechanical feel of oscillating-rotating technology remains more present on teeth than with high-frequency sonic brushes, especially for first-time power-brush users migrating from manual toothbrushes.

The dense feature list also brings complexity: if you ignore the app, advanced zone tracking and data history simply disappear in a drawer, so buyers who never use their phones in the bathroom may be better off with a simpler iO variant.

What this means for P&G and the stock

For Procter & Gamble, the Oral-B iO Series 9 is less about volume and more about a high-margin flagship that anchors pricing and justifies innovation storytelling across the oral care range. Procter & Gamble shares (ISIN US7427181091) trade on the NYSE, recently closing at about 149 dollars according to MarketBeat data.

This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.