Side-by-side comparison based on expert reviews and community consensus.
Oral-B iO Series 6
Best PremiumOral-B iO Series 9
Best Smart FeaturesPrice
$100-$130
$150-$220
Summary
The iO6 hits the sweet spot in the premium iO lineup — more modes and features than the iO3 without the steep price of the iO9 or iO10. Reddit and CNET both flag the iO4-6 range as the best value within the iO series.
The top of the iO line for users who want AI-powered brushing feedback, a full-color display, and app connectivity. CNET notes the iO series has five brush modes — more than most competitors — and the 9 adds the most comprehensive smart tracking.
Pros
- Five brush modes including whitening, intense, and sensitive
- Magnetic drive system for quieter, smoother brushing
- Smart pressure sensor with color-coded LED ring
- User-replaceable lithium-ion battery
- Compatible with full range of iO brush heads
- AI-powered brushing map tracks coverage across all tooth zones
- Full-color interactive display shows mode and battery
- Five cleaning modes including whitening and super sensitive
- Magnetic drive system for smooth, quiet operation
- Premium travel case included
Cons
- Significantly pricier than the Pro 1000 for incremental cleaning improvement
- Short 10-12 day battery life
- iO replacement heads cost more than standard Oral-B heads
- App features feel gimmicky to many users
- Expensive — hard to justify vs. Pro 1000 for cleaning performance alone
- Battery life still only ~2 weeks
- App required to unlock full value of smart features
- iO replacement heads are costly at scale
- Many users find smart features gimmicky after initial novelty
Our take
If you want the full iO experience with five brush modes and a color display without paying flagship prices, the iO6 is where to land. It's the iO series at its most sensible.
Most people don't need this, and Reddit will tell you the Pro 1000 cleans just as well. But if you're a data-driven person who actually wants to improve brushing technique, the iO9's AI coaching is the most capable Oral-B has ever built.
Buy
