Oral-B iO Series 8 vs Oral-B iO Series 9
Over three years, with heads at each maker's own pack price, the Oral-B iO Series 8 costs about $315 to the Oral-B iO Series 9's $388. Only the Oral-B iO Series 9's travel case charges the brush. Every other published figure for both is in the table, with the rows where they differ tinted.
Oral-B
Oral-B iO Series 8
~$250
For $30 over the iO7, the iO8 swaps in a color screen, restores Super Sensitive for six modes in all, and ships three heads instead of two.
Best for: A color screen and every sensitivity setting short of iO9 money
Oral-B
Oral-B iO Series 9
~$330
Oral-B's top handle in stock on its US store in September 2026 (the iO10 page was listed but not purchasable).
Best for: Frequent travellers who want to leave the charging stand at home
| Specification | Oral-B iO Series 8 | Oral-B iO Series 9 |
|---|---|---|
| Approx. price | ~$250 | ~$330 |
| 3-year cost | ~$315 ($250 handle + 9 heads at $7.22) | ~$388 ($330 handle + 8 heads at $7.22) |
| Type | Oscillating-rotating | Oscillating-rotating |
| Motion | Oscillating-rotating (round head) | Oscillating-rotating (round head) |
| Motor | iO magnetic drive | iO magnetic drive |
| Pressure sensor | Multi-signal pressure sensor: Signals if you brush too hard, too soft or just right | Multi-signal pressure sensor: Smart Pressure Sensor lets you know if you are brushing too hard, too soft, or just right |
| ADA Seal | Listed: Oral-B iO Series | Listed: Oral-B iO Series |
| Timer | 2-minute timer | 2-minute timer |
| Modes | 6: Daily Clean, Whitening, Gum Care, Sensitive, Intense, Super Sensitive | 7: Daily Clean, Whiten, Gum Care, Sensitive, Super Sensitive, Intense Clean, Tongue Clean |
| Screen | Color screen | Color screen |
| App | Yes | Yes |
| Charging | charging stand | charging stand |
| Travel case | Yes | Yes, and it charges the brush |
| Heads in the box | 3 | 4 |
| Head family | Oral-B iO | Oral-B iO |
| Head compatibility | Compatible only with Oral-B iO replacement heads | Compatible only with Oral-B iO replacement heads |
| Price per head | $7.22 (Oral-B iO Ultimate Clean 9-count, $64.99 on oralb.com) | $7.22 (Oral-B iO Ultimate Clean 9-count, $64.99 on oralb.com) |
| Replace heads every | 3 months (maker) | 3 months (maker) |
| Warranty | 2 years | 2 years |
Oral-B iO Series 8: what it gives up
- Travel case doesn't charge; the iO9's charging case is most of its $80 premium
- Lacks the iO9's Tongue Clean mode
- Three hours to charge on the magnetic charger, per Oral-B, but no figure for how long it runs
Oral-B iO Series 9: what it gives up
- Costs $80 more than the iO8, mostly for the charging case and one mode
- No battery figure even at $330, while the $65 iO2 gets one
- iO heads are proprietary to the iO range
Full pages: Oral-B iO Series 8 · Oral-B iO Series 9