Feno Smartbrush Electric Toothbrush review: A quicker way to brush without compromising on clean

When you consider one of the best electric toothbrushes, there's usually a certain design that springs to mind. Most feature a slim handle with either an oscillating or sonic brush head, alongside familiar features like a built-in two-minute timer and 30-second quadrant reminders. Beyond that, there often isn't much to separate one model from another... until you come across the Feno Smartbrush.

Instead of brushing one section of your mouth at a time, the Feno Smartbrush is designed to clean every tooth simultaneously in just 20 seconds. It's also the first toothbrush to combine daily brushing with detailed scans of your teeth and gums, using AI to provide ongoing insights into your oral health over time.

There's certainly a lot going on here, so I was keen to find out whether it could live up to its brilliant reviews.

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Price and availability

I've been testing the Founder's Edition Bundle, which costs £276/$299 and includes the Smartbrush, one custom-made TrueFit Mouthpiece, three tubes of Feno Foam toothpaste, and a complimentary tongue scraper.

There's also the Founder's Edition Plus Bundle (£368/$399), which adds a 12-month Feno Plus subscription for enhanced oral health insights, whilst the top-tier Elite Oral Health Bundle (£479/$519) also includes an at-home Salivary Microbiome Insight Test that analyses the bacteria in your mouth.

All of the bundles are available through Feno's online store as well as Amazon, but it's important to know that every order currently ships from the US.

If you're ordering internationally, you'll likely be waiting between one and three weeks for delivery, whereas US customers benefit from free shipping.

Scan and set up

As the Smartbrush is built around a personalised fit, the setup process actually begins before the toothbrush even arrives. Shortly after placing my order, I received an email asking me to download the companion app, create an account, and scan my mouth using my smartphone. The whole process took less than a minute, and the scans were automatically uploaded so Feno could manufacture a mouthpiece tailored specifically to my teeth.

A few weeks later, my personalised bundle arrived. Inside the box was the Smartbrush handle, two different sized TrueFit Mouthpieces, three tubes of Feno Foam toothpaste, a tongue scraper, and the magnetic Feno Snap Charger.

From there, I charged the Smartbrush using the Snap Charger, which took around two hours to reach full battery. Once charged, I simply clipped the TrueFit Mouthpiece onto the SmartHandle until it clicked securely into place.

I then returned to the app, entered the pairing code displayed on the brush, connected it to Wi-Fi, and followed the remaining setup instructions. Within a few minutes, everything was ready to go.

Design and features

As mentioned, the Feno Smartbrush looks nothing like a conventional electric toothbrush. Instead of cleaning one tooth at a time, it uses a custom-made U-shaped TrueFit Mouthpiece that fits over both your upper and lower teeth simultaneously. Just like a standard brush head, it will last you around three months.

Inside the mouthpiece are around 18,000 soft nylon bristles, which is significantly more than the roughly 2,500 found on a traditional electric toothbrush. Combined with the SmartHandle's motor, this allows every tooth to be brushed at the same time in a single 20-second cleaning cycle.

It's certainly a very different approach, but it completely removes the need for the standard two-minute brushing routine we've all grown up with.

The SmartHandle also houses a built-in high-definition oral scanner which can analyse data to build personalised oral health reports. The app also tracks brushing performance and offers AI-powered recommendations, whilst users who subscribe to Feno Plus gain access to additional coaching and deeper oral health insights.

Battery life is lasts around a week between charges, which isn't revolutionary, but feels reasonable given everything the brush is doing.

Performance

The Feno Smartbrush definitely took a bit of getting used to, but once I got into the swing of things, I have to say I really enjoyed using it. Its biggest advantage is undoubtedly how it reduces the amount of time you're meant to brush for, as well as the worry of whether you've actually reached every part of your mouth. If those are two things that cause you concern often, you'll probably get on really well with it.

Before getting started, I had to choose between the two mouthpiece sizes. I found the smaller one worked much better for me, as it didn't press against the back of my gums as much. I also settled on the 30-second brushing mode, as the 20-second option just felt a little too quick. With only 10 seconds between them, I'd much rather spend the extra time making sure my teeth were properly cleaned.

When I first started using it, I noticed a bit of bleeding, which is always slightly alarming when you take good care of your teeth. However, I quickly read that the Smartbrush reaches areas that your regular toothbrush might not, so a little initial bleeding isn't unusual and should settle down as your gums adjust.

The brushing experience itself is also... quite juddery. The vibrations are strong enough to make your cheeks wobble a little, but it never felt uncomfortable or painful, especially once I'd settled on the correct mouthpiece size. Whilst brushing, you simply move the handle in gentle circular motions to make sure every surface is covered, and the Smartbrush automatically switches off once you've reached the end of your chosen timer.

I also really liked the Feno Foam toothpaste, which works well with the mouthpiece. It's minty but not overpowering, and the foaming texture feels nice compared to a paste. However, Feno makes it clear that you can still use the Smartbrush with your regular toothpaste too, which is great to know.

After around a week of using it, I was pleased with the results, and it never felt like I was compromising on cleanliness by switching away from a traditional electric toothbrush. My teeth felt clean after every brush, and it seemed like most areas of my mouth were being thoroughly reached.

I wouldn't say it completely revolutionised my oral care or left me feeling like I'd just walked out of a hygienist appointment, but the results were consistently good and exactly what I'd expect from a quality electric toothbrush.

Verdict

The Feno Smartbrush won't be for everyone, but if you've ever found yourself rushing your brushing routine or wondering whether you've actually cleaned every part of your mouth, it makes a very convincing case for itself. It's easy to use, surprisingly effective, and provides similar results to a traditional electric toothbrush – just in half the time. Its different design means it takes some getting used to, but once you've settled in, it's hard not to appreciate the convenience.

Alternatives to consider

There really isn't anything quite like the Feno Smartbrush on the market, aside from a handful of similarly designed alternatives you'll find on Amazon or Temu. However, if you'd prefer to stick with a more traditional electric toothbrush, I'd highly recommend the Oral-B iO6.

Alternatively, the Suri 2.0 is another excellent choice, particularly if you travel regularly. It's far more compact, offers a significantly longer battery life than the Feno, and still delivers fantastic everyday brushing performance.