Comparison
Oral-B iO vs Pro 3: what the extra money buys
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In short
The Oral-B Pro 3 already does the basics well: a round oscillating head, a two-minute timer and a visible pressure warning. The iO adds a quieter magnetic drive, a smart pressure sensor that also warns when you press too softly, app tracking and, on most models, a display. If you want those extras, the iO is the step up; if not, the Pro 3 covers the essentials.
Products for this job
Compare all 6 productsOral-B iO6: Sensitive and Super-Sensitive modes, display
Check price on AmazonAffiliate linkOral-B iO10: iOSense charger display, 7 modes
Check price on AmazonAffiliate linkOral-B iO9 Special Edition: charging case and magnetic pouch
Check price on AmazonAffiliate link
Our verdict
The Pro 3 covers the essentials with cheaper heads. Pay for an iO if you will value the quieter magnetic drive, the smart pressure ring that confirms the right pressure, and a display or charging case on higher models.
Oral-B sells two main families of rechargeable brush: the long-running Pro range, including the Pro 3, and the newer iO range. Both use a small round head that oscillates and rotates, so the core cleaning action is similar. The iO costs more, and the question is what that extra buys in daily use. This comparison looks at the drive, pressure feedback, heads, modes and charging, using widely documented facts rather than invented figures. The Pro 3 is not one of the models in our guides, so this page compares the two families in general terms and points to our iO guide for model details.
Drive and feel
The Pro 3 uses Oral-B's oscillating, rotating and pulsating action. It is a familiar design that many dentists and hygienists have seen for years. It is noticeably louder than an iO and has a mechanical buzz.
The iO uses a magnetic drive. The head still oscillates and rotates, and Oral-B adds micro-vibrations at the bristle tips. In practice the iO is quieter and smoother, and many people find it feels less harsh. That is a comfort difference rather than a promise of better results.
Side by side
The table sums up the general differences between the two families. Exact modes and box contents vary by model and pack, so check the listing for the version you are looking at.
| Feature | Oral-B Pro 3 | Oral-B iO |
|---|---|---|
| Drive | Oscillating, rotating, pulsating | Magnetic drive with micro-vibrations |
| Pressure warning | Visible light when pressing too hard | Smart ring: too hard, too soft or just right |
| Timer | Two minutes with 30-second pulses | Two minutes, shown on display models |
| Display | No | On iO6 and above, per listings |
| App | Varies by version; check the listing | Yes, with AI position tracking on listed models |
| Brush heads | Standard Oral-B heads | iO heads only |
Pressure sensor: the most useful upgrade
The Pro 3 lights up when you press too hard, which is the warning most people need. The iO goes a step further. The iO5 listing describes a ring that shows red, white or green to tell you whether you are brushing too hard, too softly or with the right pressure. Getting a positive signal as well as a warning makes it easier to settle into a light touch.
If you tend to scrub, either brush will help you notice it. If you like clear feedback every time, the iO ring is the more informative of the two. Our explainer on pressure sensors shows how each type works.
Brush heads and ongoing cost
This is the hidden difference. The Pro 3 takes standard Oral-B heads, which are widely sold, come in many styles and tend to cost less per head. The iO takes iO heads only, and those are usually dearer. Over a year you will buy about four heads per person if you follow the NHS advice to replace a brush every three months.
Use our brush-head planner to see how many heads your household needs, then compare current multipack prices for each type. See also Oral-B iO brush heads explained.
Modes, display and charging
Most Pro 3 versions offer a small set of modes, usually Daily Clean, Sensitive and Whitening. The iO5 and iO6 listings list five modes, including Sensitive and Super-Sensitive, and higher iO models have six or seven. The display on the iO6 and above shows the mode, a timer and the battery level.
Charging is another difference. Several iO models list a 3 hour fast charger, and higher iO models come with a charging travel case. The Pro 3 uses a standard charging stand. Battery life varies by model, so check the listing or manual for the version you buy.
Who should choose which
Whichever you pick, technique matters more than the model. Our guide to using an electric toothbrush covers angle, pressure and timing.
- Choose the Pro 3 if you want a reliable oscillating brush with a pressure warning and cheaper, widely available heads.
- Choose an iO5 or iO6 if you want the quieter drive and the more detailed pressure ring, with or without a display.
- Choose an iO7 or above if you want a colour display, a fast charger or a charging travel case. See our guide to brushes under 300 for options.
Frequently asked questions
Do Pro 3 heads fit an iO? No. iO handles only take iO heads, and iO heads do not fit Pro or other older Oral-B handles.
Is the iO gentler than the Pro 3? Many people find the iO smoother and quieter. Both have pressure warnings. If your gums are sore or bleed, ask a dentist for advice rather than relying on a brush setting.
Does the iO need the app? No. The app adds tracking, but the brush works fully without it, with the timer and pressure ring built in.
Is a Pro 3 enough for good brushing? The NHS advises brushing twice a day for about two minutes with fluoride toothpaste. A Pro 3 has a timer and pressure warning to help with that.
What you need
- Check price on AmazonAffiliate link
Oral-B iO6: Sensitive and Super-Sensitive modes, display