The Series 3 has 3 cleaning modes (daily clean, sensitive & whitening) compared to the 4 of the Series 4 (daily clean, sensitive, super sensitive & whitening). The extra mode the iO4 has is super sensitive.

iO Series 7 Electric Toothbrush | Oral-B Oral-B iO Series 7 Electric Toothbrush | Oral-B

All iO models have a reminder system built into the app and the brush handle. How this reminder is displayed differs. Models like the 8 and 9 Series do have extra cleaning modes compared to the 3, 4 and 5. But, these modes don’t change the actual cleaning results. Although both have 5 cleaning modes, they are different. The iO5 has daily clean, sensitive, super sensitive, intense and whitening, whilst the iO6 has daily clean, sensitive, intense, whitening and gum care. The iO5 has super sensitive whilst the iO6 has gum care. The iO9 has a power adapter hardwired into the charging stand and a separate, detachable, adapter for the power2go case. The iO10 has just 1 detachable adapter for both the charging stand and power2go case.The higher the model number the more features and the more expensive it is. The range topping model is the iO Series 10. The complete iO Series iO3 through to iO10 from left to right They are similar in more ways than they are different The 3, 4, 5 and 6 all come with a standard Oral-B charger. White in colour, it has a protuberance on the top that fits into the base of the brush handle. The iO6 is the best value option. It strikes the balance between additional features and price. It has some smart features, but not the full suite. What sets them apart are additional features. Examples include more brushing modes, in-handle display and ‘smart’ (Bluetooth) technology. These are nice-to-have, but not critical. All of the iO Series brushes have a 2 minute timer, pacer and pressure sensor. These are the key features that dentists recommend.

Electric toothbrushes | Argos Oral-B Electric toothbrushes | Argos

Of course, the table and quoted prices are just a guide. The actual selling prices vary from one retailer to another. The Series 8 has 6 cleaning modes (daily clean, sensitive, super sensitive, intense, whiten & gum care) compared to the 5 of the Series 7 (daily clean, sensitive, intense, whiten & gum care). The extra mode the iO8 has is super sensitive.Overall, brush head reminders are a feature that are nice-to-have, but not critical. If you’re organised enough you can simply use a recurring calendar reminder. The fact that they are included on each iO model means you don’t need to factor this feature too heavily into your choice of iO brush models. Battery life should be similar, but premium models are inconsistent Having handled & tested hundreds of products there really is very little he does not know about them. The round charger has no protuberance and supports 100-240v. It takes up to 3 hours to recharge the brushes on this stand.