Oral-B iO vs Philips Sonicare

How the two heads move

The Oral-B iO uses a small round head that oscillates and rotates, and the listings describe added micro-vibrations. The handle uses a magnetic drive, which is part of why iO brushes are quieter than older Oral-B models. You guide the round head from tooth to tooth, pausing on each one.

Philips Sonicare brushes are sonic. The oval head moves side to side at high speed; the DiamondClean 9000 listing states up to 62,000 bristle movements per minute. Philips says this movement also drives fluid between teeth and along the gumline. You glide the head slowly along the teeth rather than stopping on each one.

Neither motion is right for everyone. Some people find the round head easier to place around back teeth; others prefer the larger oval head because it feels more like a manual brush. Our explainer on sonic vs oscillating toothbrushes covers the motions in more detail.

Models compared from the listings

The table uses what each Amazon listing states for four models featured in our guides. Where a listing does not give a figure, the table says so rather than guessing.

See our premium electric toothbrush guide →

Pressure sensors and feedback

Brushing too hard is a common habit, and both brands build in a warning. The iO uses a light ring around the neck of the handle. The iO6 listing says it signals if you brush too hard, too soft or just right, and the iO5 listing describes red, white and green signals.

Sonicare handles use a light ring at the base that flashes or glows when you press too hard. On the DiamondClean 9900 Prestige, SenseIQ also lowers the intensity automatically when you push too hard. If gentle brushing is your main concern, our guide to toothbrushes with gentle modes and pressure sensors compares both brands.

Modes, apps and displays

Oral-B counts modes such as Daily Clean, Intense Clean, Sensitive, Super-Sensitive and Whitening, with higher iO models adding more. Philips pairs modes such as Clean, White+, Gum Health and Deep Clean+ with three intensity levels, so a four-mode Sonicare offers twelve settings.

Both brands have an app that can track brushing time and coverage. Higher iO models put a display on the handle that shows mode, time and battery. The Next-Generation Sonicare 9900 Prestige listing mentions an interactive display, but the older DiamondClean models rely on lights. Most people settle on one or two modes, so a long mode list matters less than a comfortable head and a good pressure warning. See brushing modes explained.

Brush heads and running costs

iO handles take iO heads only; older Oral-B heads do not fit them, and iO heads do not fit older Oral-B handles. Sonicare click-on heads fit most current Sonicare handles, which makes it easy to share a pack across a household with different models.

Whichever you choose, budget for a new head about every three months, which is what the NHS advises for toothbrushes. That is four heads a year per person. Our brush-head planner works out how many heads a household needs each year. Prices change often, so compare current multipacks rather than relying on one figure.

Charging and travel

Several iO models, including the iO7, iO8 and iO9, list a 3 hour fast charger, and higher models come with a charging travel case. Sonicare DiamondClean models charge on a stand or in a glass, and several come with a USB charging travel case; the DiamondClean 9000 lists up to 14 days of regular brushing on a full charge.

UK listings for both brands mention a two-pin bathroom plug, which fits a shaver socket. If you travel often, compare the cases in our guide to toothbrushes with a charging travel case.

Frequently asked questions

Is Oral-B iO or Sonicare better for sensitive gums? Both ranges have gentle modes and pressure feedback. The best choice is the head feel you find comfortable. If you have sore or bleeding gums, see a dentist, as a toothbrush cannot diagnose or treat the cause.

Can I use Sonicare heads on an Oral-B iO? No. Each brand uses its own fitting, and iO heads only fit iO handles.

Which is quieter? Oral-B says the iO magnetic drive is quieter than its older brushes. Sonic brushes have a higher-pitched hum. Noise is personal, so it is worth hearing one before you buy if it matters to you.

How long should I brush with either? The NHS advises brushing for about two minutes, twice a day, last thing at night and at one other time. Both brands have a two-minute timer built in.