Oral-B iO Series 4 vs 5 vs 6 vs 7 vs 8 vs 9 vs 10 comparison

Detailed comparison: the main things to know about the iO range

The iO Series first launched in 2020, with the Series 7, 8 and 9. It has since evolved from 3 to 8 brushes.

The Series 3 is the entry-level model. This is the least feature rich and most affordable.

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The higher the model number the more features and the more expensive it is. The range topping model is the iO Series 10.

They are similar in more ways than they are different

All of the models have the following features:

• 2 minute timer
• 30 second quadpacer (20 second sextant pacer on iO10)
• Smart visible pressure sensor
  • Lights up red when too much pressure is applied
  • Lights up green when the correct pressure is applied
  • Lights up white when there is insufficient pressure
• Rechargeable lithium-ion battery offering 14+ days of use between charges
• Bluetooth technology to connect to a smartphone (the iO3 is the only exception)
• Quieter, frictionless magnetic drive system
• Oscillating-rotating cleaning action with micro-vibrations
• iO-specific brush heads
• Cleaner, more minimal design compared to other Oral-B models

They all clean as well as each other

Simply put, they all clean as well as each other.

All models within the iO range use the same brush motor with the same configuration.

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.

Using the intense mode won’t necessarily remove more plaque from the teeth and gumline. You don’t need a whitening mode to make your teeth whiter — the daily clean mode can achieve this.

Your brushing time and technique have a far bigger impact on the cleaning results than the mode you use.

Various price points to suit different budgets

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$80 is the price for the most affordable model, the iO3.

The most feature-rich brush is the iO10. It costs $400. That’s a difference of $320 for some extra cleaning modes and smart technology tracking features. Justifying this premium is very difficult.

But these prices account for the typical 20% discount on retail prices. $400 is the difference if we compare the ‘recommended retail prices’.

All brushes in the range use the same iO specific brush heads. Whether you opt for the iO3 or iO10, the long term ownership cost will be impacted most by the initial purchase price of the brush handle, not the heads.

Of course, the table and quoted prices are just a guide. The actual selling prices vary from one retailer to another.

As you might expect, models with extra features or increased box contents do command a premium.

The iO3 is the cheapest and has the essentials anyone needs.

Assuming you want something a bit more capable, then the iO6 represents the best value option. It has many of the most desirable features of the iO range, including the in-handle display. But, it remains relatively affordable and you get the best of both worlds, so to speak.

Whilst the iO10 is the most technically advanced, we don’t recommend it. The only difference between the iO9 and the iO10 is the enhanced charging stand and it’s simply not worth that kind of money.

5 of the 8 variants have a display built into the brush handle.

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3 of them are colour, the other 2 are black and white.

Colour or not, they operate in the same way and provide extra functionality. For example, you can change the handle language, change the colour of the smart ring or even reset the brush.

The biggest benefit is that it makes it much easier to switch between the brushing modes or see which one you have selected.

All the brushes have more cleaning modes than you need

Depending on the model you go for, you have the choice between 3, 4, 5, 6, or 7 brushing modes. 7 is the maximum number of cleaning modes available on any Oral-B brush.

I’ve yet to find anyone who uses them all or any real justification for having so many. The reality is the cleaning results between each are very similar.

For most users, 1 mode, daily clean, is more than satisfactory.

A second, lesser powered mode such as sensitive is a welcome addition for new electric toothbrush users, or those with gum disease or sensitivity.

Each of the modes use different amounts of power from the motor. This impacts the angle of oscillation at the bristle tips to create brushing patterns and effects that are different from one another.

All modes are designed to be used for 2 minutes. The only exception is tongue clean which is set for 30 seconds.

The table below shows which iO model has which mode. Should you want to learn more about each, do read our Oral-B cleaning modes explained article.

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