It should go without saying really, the iO toothbrush leaves your teeth feeling super clean. You'd expect that from a toothbrush that has six years of research and over 250 patents behind it. Oral-B have developed a new app to go along with this brush with a revised design incorporating the Brushing Recognition AI. If you have it open as you brush, it displays your progress in real-time. Once you finish, it gives you an overall score based on your brushing time, coverage, and pressure. The actual charging cord for the case is quite bulky. Rather than a simple USB cable, which some other toothbrush charging cases have, this one uses an adaptor which is almost as bulky as the regular charging stand. If this is out of your budget, the good news is that there are plenty of other affordable electric toothbrushes around. They may not have quite the same bells and whistles but they will still get your teeth very clean. Interspace: to be used on top of your daily brush head, for deep clean in hard-to-reach areas and healthier* gums

If you're guilty of scrolling on your phone when you brush and not really paying attention to what you're doing, the app will certainly help you focus. But you do have to be committed to using it to get the most out of it. Sometimes toothpaste can build up under the brush head and solidify to quite a tight bond. Then, when the brush head is ready to be replaced, it can break when removing it to leave this piece behind. To prevent this, we recommend the cleaning and maintenance routine noted in the manual.The new brush heads are presumably necessary for the new style of motor, but unfortunately they are not compatible with Oral-B's older toothbrushes. Nor are the older style heads compatible with the iO. The red light is accompanied by a slight reduction in the motor speed. You can customize the color displayed on the LED ring when the brush is on but not in use; a fun but completely unnecessary feature. As has become quite standard on electric toothbrushes now, a built-in timer signals when your brushing time is up and a quad-pacer tells you when it's time to move to a new section of your mouth. For the standard Daily Clean mode, this is set to two minutes broken into four 30-second intervals. You can adjust these settings via the app if you wish. Two extra brushing modes are nice but you'll probably never really use them. The Tongue Cleaner mode is just programmed to turn off after 20 seconds, but you could do the same thing manually with any other mode. And actually, we recommend you try using a tongue scraper if you really want a clean tongue.

If you don't have the app open as you brush, some information will still be stored in the brush and transmitted to the app next time you open it. Charging and battery life

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You might also be interested in our guide to the best water flossers to complete your oral hygiene routine. FAQs Is there an Oral-B iO series 10? To fix this, try running the toothbrush’s top section (around the plastic connector and metal shaft) under warm water for at least ten seconds. Then, see if you can pull the extra bit off. You might have to give it quite a forceful tug, but it should come right off. If it does, your new brush head should fit. When comparing the iO7, 8 and 9, it seems worth paying the extra for the top model, as long as you've found it with a decent discount. A charging travel case is a great idea, but unlike many other brands which supply a USB cord, the Oral-B case has a special main charger. This makes it much less compact, taking up almost as much space as the regular charging base.