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Oral care
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5 reasons why dentists are recommending this 20-second toothbrush
★★★★★
Rated 4.9 by 500+ Feno owners · 99% would recommend
Founders Edition
$299
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01
It brushes every tooth at once, in 20 seconds
Most brushing routines fail on technique. Wrong angle, missed zones, a two-minute timer that loses to a busy morning.
Feno removes technique from the equation. The TrueFit Mouthpiece surrounds every tooth at the same time while the motor drives 250 brushing strokes per cycle. Top and bottom, inside and out, all at once.
Nothing to remember. Nothing to get wrong. Twenty seconds, done.
★★★★★
The Feno Smartbrush is a game changer for me. Cleaning my teeth in just 20 seconds feels incredible, and the TrueFit Mouthpiece ensures every tooth gets attention. My teeth have never felt this clean, and it's so quick and easy to use.
Andrew · Verified buyer
02
Finding your size takes one scan in the app
A mouthpiece only works if it actually fits. The right size means the bristles sit against every tooth, top and bottom, so nothing gets skipped in the 20 seconds.
That's why the TrueFit Mouthpiece comes in seven sizes. During setup, the Feno app scans your smile and matches you to the best size for your mouth. No measuring, no guesswork.
And if the first size isn't right, Feno exchanges it for free.
★★★★★
Whatever they do with the mouth pictures works. The mouthpiece fit perfect from the start and keeping it in for 20 seconds is no issue.
David · Verified buyer
03
It shows you what your dentist sees.
Most people get a look at their own oral health twice a year in a dentist's chair. Feno checks you twice a day.
A camera in the handle scans before you brush, then the app turns it into an oral health score and a map of your mouth. You can actually watch your progress between visits.
No more guessing how your mouth is doing. Now you can see it.
★★★★★
The scan analysis is both concise and informative about my oral composition and hygiene, which feels the same as having a dentist in my bathroom!
Daniel S. · Verified buyer
04
It's clinically tested.
Plenty of mouthpiece toothbrushes promise speed. Almost none put their design through clinical testing. Feno did.
Part of what's being tested is coverage. A typical electric brush head holds around 2,500 bristles, and you move it from tooth to tooth, hoping your technique covers everything. The Feno mouthpiece holds 18,000, working simultaneously.
Not just a faster version of your old routine. A tested one.
★★★★★
A thorough and quality cleaning in a fraction of the time. It's only 30 seconds on the Feno as opposed to 3 to 4 minutes on my Oral B.
Bill C. · Verified buyer
05
Checkups start sounding
like
compliments.
Here's the part Feno owners bring up most in their reviews. Not the 20 seconds, not the app. What their dentist said at the next cleaning.
When every tooth gets brushed properly twice a day, the results show up where they matter: in the chair, from the people trained to spot the difference.
Your dentist will tell you before we do.
★★★★★
The smartbrush has been a game-changer for me. My dentist commented on how great my teeth and gums are looking.
Meghan H. · Verified buyer
“
The hygienist looked at my teeth and said, well, you didn't leave anything for me to do! When the dentist came in he said, wow, your teeth look great. I have never been told this at the dentist.
Denise G. · Verified buyer · ★★★★★
The one readers ask about
Founder's Edition
Bundle
★★★★★
4.9 · 300+ reviews · 99% would recommend
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“
This has saved me a massive amount of time while offering amazing health benefits. My dentist couldn't believe the change in my mouth health!
Jason · Verified buyer
4.9
★★★★★
Averaged across 500+ reviews. 94% five-star · 99% would recommend.
★★★★★
A huge win
Such a timesaver and simply better than I could do myself. My hygienist commented on my teeth, which is a huge win.
Tory M. · Verified buyer
★★★★★
Game changing
I genuinely look forward to brushing my teeth multiple times a day now. My mouth feels so much cleaner than the average electric toothbrush.
Armaan D. · Verified buyer
★★★★★
My dentist noticed
The smartbrush has been a game changer for me. My dentist commented on how great my teeth and gums are looking.
Meghan H. · Verified buyer
★★★★★
vs my Oral B
A thorough and quality cleaning in a fraction of the time. It's only 30 seconds on the Feno as opposed to 3 to 4 minutes on my Oral B.
Bill C. · Verified buyer
★★★★★
Gums don't bleed anymore
I've always had a problem with my gums bleeding. I've been using Feno for about 45 days and my gums don't bleed anymore. And it only takes 30 seconds.
Greg · Verified buyer
★★★★★
The future of brushing
It is insane how well it cleans your teeth. This brush leaves them silky smooth. In only 20 seconds? Nuts.
Collin · Verified buyer
Questions
Before you
switch.
How is the Feno Smartbrush™ different from other electric toothbrushes?
+
The Feno Smartbrush is a radical step forward for oral health. The average toothbrush has 2,500 bristles; the Feno Smartbrush has an average of 18,000. The average toothbrush brushes each tooth one at a time; the Feno Smartbrush brushes all teeth simultaneously. The average brush cycle takes 120 seconds; the Feno Smartbrush takes 20. The Feno Smartbrush is also the first brush that takes deep scans of your teeth and gums to provide ongoing insights into the condition of your oral health. An astonishing 90% of individuals suffer from some form of gum disease, an oversight we aim to correct with the Feno Smartbrush, designed as the product to bridge oral health and overall health.
Does the Smartbrush need any user technique to work effectively?
+
The Feno® Smartbrush is designed to be user-friendly and requires minimal technique for effective use. While the advanced technology, including the TrueFit Mouthpiece™ and ArcFlow Tech™, ensures comprehensive cleaning, users should still follow a simple technique for optimal results. While the Smartbrush is on, it is recommended to move the TrueFit™ Mouthpiece in a slow circular motion. This motion helps to achieve optimal bristle contact with all areas of the teeth and gums, enhancing the brushing results.
How does the Feno app provide personalized feedback and advice on oral health?
+
The Feno app revolutionizes personalized oral care by leveraging advanced technology and professional expertise. Embedded in the Smarthandle of the Smartbrush is a scanner that captures images of your mouth, including critical areas like the gumline, tooth integrity, and signs of inflammation. Once you complete a scan, the data is automatically synchronized with your profile on the Feno app. This seamless integration ensures that your oral health information is consistently up-to-date and readily accessible. The app then utilizes a dual approach for analysis: a network of licensed dentists and an evolving machine learning model. These dentists review and annotate your scans, providing valuable insights into your oral health status. Their annotations not only offer you personalized feedback and advice but also contribute to training our machine learning model. This model is designed to recognize patterns and deliver rapid, routine insights, enhancing the accuracy and effectiveness of the feedback you receive over time. Additionally, the app's chat feature allows you to directly communicate with a dentist from our network. This functionality enables you to discuss your scan results, ask questions, and receive expert advice, all within the app. You can easily share your scan data and reports with your dentist during these consultations, making the discussions more informed and productive.
Is there privacy built-in with the scanner?
+
Yes, the Feno Smartbrush includes multiple built-in privacy features for the scanner. The device is equipped with a secondary privacy chip, ensuring that all operations related to the scanner are securely handled. This chip prevents remote access to the scanner, enhancing the security and privacy of the device. Additionally, all data collected by the scanner is encrypted, providing an added layer of security to protect users' personal information.
Does Feno work without the app?
+
Yes. The brush is fully functional on its own. The app just adds to it: tracking, coaching, and insights that help you get more out of every session over time.
What's included with Feno, and are there any ongoing costs?
+
Feno is a personalized-fit, motorized, sensor-equipped device that brushes your whole mouth in seconds. There are two consumables to plan for: Feno Foam, and a fresh TrueFit Mouthpiece we recommend changing every three months. Everything's listed upfront, so you always know what to expect.
Can I use my own toothpaste, or do I need Feno Foam?
+
You can use any toothpaste you like. That said, Feno Foam is built for the mouthpiece, it spreads evenly across all 18,000 bristles at once, so every tooth gets the same coverage in that 20-second clean. Toothpaste works; foam just works better with how Feno brushes.
What if the mouthpiece doesn't fit my mouth?
+
Feno doesn't ship one universal size. Based on your mouth scan, we match you to the right TrueFit Mouthpiece from our seven sizes, a personalized fit, not a one-size tray (which is exactly why older U-shaped brushes failed). If it doesn't feel right at first, it's often just seating: place it in gently with the device off, bite down softly, and wiggle your jaw so the bristles reach every tooth. Still not comfortable? Reach out to support and we'll resize you. Your first two size exchanges are free.
Am I locked into a subscription?
+
No. Feno Plus is optional and you can cancel anytime from your account. You can also buy refills of Feno Foam one off whenever you need them.
What if I don't like it?
+
Every order is covered by our money-back guarantee: you have 30 days from delivery to return it. For US orders we provide the return label; outside the US, return shipping is covered by you. Just reach out to support and we'll walk you through it. And because your first two size exchanges are free, an imperfect first fit never costs you anything.
Who is Feno not for?
+
Feno isn't the right fit for everyone. We don't recommend it for anyone under 18, anyone with active braces, anyone with a crown placed within the last 4 weeks, or anyone with a pacemaker. If any of these apply to you, we'd suggest checking with your dentist before ordering.
Feno Founder's Edition · $299
Five reasons down. One
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to go.
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Individual results may vary. © 2026 Feno
Founders Edition
$299
Get the Founder's Edition
Try Risk-Free - $389
$489
45-Day Guarantee
buy atom x