Quick answer

If you want the most advanced cleaning and smart features, the Oral-B iO Series 9 is your best pick. For a balanced mix of performance and value, the Series 8 offers nearly the same experience at a lower price. The Series 6 is the budget-friendly choice that still delivers excellent results, especially if you're new to electric brushing.

Choosing between the Oral-B iO Series 9, 8, and 6 can feel overwhelming. Each model shares the same iO technology, but they differ in features, price, and what they offer for your daily routine. This comparison breaks down the key differences so you can decide which one fits your needs and budget.

We'll look at what each model includes, how they compare in practice, and who each one is best for. By the end, you'll know exactly which iO toothbrush is the right fit for you.

What the Oral-B iO series has in common

All three models—Series 9, 8, and 6—use Oral-B's iO technology, which combines gentle micro-vibrations with the oscillating-rotating action that Oral-B is known for. This combination is designed to break up plaque effectively while being gentle on gums. Each model also connects to the Oral-B app, giving you real-time feedback on your brushing habits.

All iO brushes come with a magnetic charger that snaps onto the handle, so there's no need to fiddle with a travel case or a charging base. The handles are also designed to be comfortable to hold, with a sleek, modern look that fits well in any bathroom.

  • All iO models use the same brush heads, so you can share heads between them if you have multiple handles.

Oral-B iO Series 9: The flagship experience

The Oral-B iO Series 9 is the top-of-the-line model in the iO lineup. It comes with the most advanced features, including a color display that shows your brushing mode, pressure alerts, and a smart timer. It also includes a travel case that charges your brush on the go, which is a big plus for frequent travelers.

The Series 9 also offers more brushing modes than the Series 6, giving you more control over your cleaning experience. If you want the absolute best that Oral-B has to offer, the Series 9 is the clear choice, but it comes at a higher price point.

  • The color display makes it easy to see which mode you're using and whether you're applying too much pressure.

Oral-B iO Series 8: The sweet spot

The Series 8 sits between the Series 9 and Series 6, offering many of the same premium features at a lower price. It includes a color display, pressure alerts, and multiple brushing modes, just like the Series 9. The main difference is that it doesn't come with the travel case, and it may have a slightly different mode selection.

If you want the advanced features of the Series 9 but don't need the travel case, the Series 8 is a smart compromise. It gives you the same excellent cleaning performance and app integration, but for less money.

  • The Series 8 is often the best value for people who want most of the premium features without the premium price.

Oral-B iO Series 6: The smart entry point

The Oral-B iO Series 6 is the most affordable model in the iO lineup, but it still delivers the core iO cleaning experience. It includes a smart pressure sensor and connects to the app, but it lacks the color display of the Series 8 and 9. Instead, it uses a simpler LED indicator to show you when you're brushing too hard.

The Series 6 also has fewer brushing modes than the higher-end models, but it still covers the basics: daily clean, sensitive, and whitening. If you're new to electric toothbrushes or just want a reliable, effective brush without extra bells and whistles, the Series 6 is a great choice.

  • The Series 6 is a great option for kids or teens who are ready for an adult electric toothbrush but don't need all the extra features.

Key trade-offs to consider

  • Features vs. price: The Series 9 has the most features, including a color display and travel case, but it costs more. The Series 6 offers the essential iO cleaning at a lower price, but you give up the display and some modes. Decide if the extra features are worth the higher price for your daily routine.
  • Display vs. simplicity: The Series 8 and 9 have a color display that shows mode and pressure alerts, while the Series 6 uses a simpler LED indicator. If you like visual feedback, the display is a nice upgrade. Think about how much feedback you want while brushing.
  • Travel case vs. no case: The Series 9 includes a charging travel case, which is handy for trips. The Series 8 and 6 do not include one, so you'd need to buy a separate case if you travel often. If you travel frequently, the Series 9's travel case might be worth the extra cost.

Product facts at a glance

Which iO model fits you best?

Best for

  • Tech enthusiasts who want the most advanced features and don't mind paying a premium: choose the Series 9.
  • People who want a balance of features and value, and don't need a travel case: the Series 8 is ideal.

Not for

  • Budget-conscious shoppers who still want the iO cleaning experience: the Series 6 is a better fit than the Series 8 or 9.

Ultimately, the best Oral-B iO toothbrush for you depends on your priorities. If you want the full feature set and don't mind the cost, go with the Series 9. If you want most of those features for less, the Series 8 is a smart choice. And if you're looking for a solid, affordable way to upgrade your brushing, the Series 6 won't disappoint.