Feno (feno.co) has a 4.5 out of 5 rating on OK.one, based on 61 user reviews collected here. It is listed under Health & Medical and its reputation is excellent. 88% of reviews are 4 stars or higher and 11% are 1 star; The business has replied to 100% of negative reviews; 46 of them were added in the last 12 months. Last updated 2026-08-10.
What people say
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Harper M. Calloway · 1 review · Experienced 2026-01-17 ·
★★★★★
I had a very disappointing experience…
I had a very disappointing experience with this company.
I requested to cancel my order before it was fulfilled and clearly explained the reason when asked. After that, communication stopped. Emails were not answered, and when I tried calling, no one picked up. Instead, I received an automated message saying phone support is unavailable and to contact them via text or email — which I had already done, multiple times.
Despite following their instructions and providing everything they asked for, I received no confirmation of cancellation or refund. I was forced to open a PayPal Credit dispute just to protect myself.
This experience caused unnecessary stress and wasted time. A legitimate company should not ignore customers once payment is made, nor make support inaccessible. I would strongly caution others before ordering.
Tugba ugurlu
Reply from Feno2026-01-20
Hi Harper — we’re truly sorry for the frustration you experienced. That’s not the experience we want for anyone.
We’ve reviewed our records but can’t locate an order under this name. Please note there are unaffiliated third-party sites selling products claiming to be Feno, which we are not connected to. That said, we genuinely want to help.
Our phone support is limited, which is why calls may route to email/text, and we understand how frustrating that can be. If you purchased directly from Feno, we’d like to investigate and resolve this properly.
Please contact us at [email protected] with any order details or receipt so we can assist.
A
Adrian LaCalle · 3 reviews · Experienced 2025-01-28 ·
★★★★★
Dental Innovative Genius
Feno Toothbrush is one of the most innovative dental products of our day, & age! The time saved, makes this product worth every cent.
M
Mark Hilliard · 3 reviews · Experienced 2025-08-01 ·
★★★★★
Feno is the best!
Feno has been excellent to work with. Not only is their product everything they promised (and more), but their customer service has been top notch! I can't recommend Feno highly enough!
A Promising Step Forward in At-Home Oral Healthcare
Feno has introduced a compelling new approach to at-home oral healthcare. The company's product provides a detailed analysis of oral health, moving beyond simple cleaning to a more proactive and informed approach to dental hygiene.
While the term "game-changer" may be premature, Feno's current technology is a significant step forward. It offers valuable data that empowers users to understand their brushing habits and monitor their oral health from home.
I am particularly fascinated to see how their future technology evolves as the company matures. The foundation they have built is solid and suggests a promising future for both Feno and the field of at-home oral health.
M
Michael Mani · 1 review · Experienced 2025-08-12 ·
★★★★★
Best product that's out there for…
Best product that's out there for toothbrush experience. It's futuristic, it cleans the deepest parts of your mouth, and the best part it works!
I’ve been using the Feno toothbrush for several months, and I’m really impressed. It’s comfortable to use, gets my teeth cleaner than they’ve ever been, and makes the whole process quick and easy. The design is sleek and user-friendly and the customer service is outstanding. It’s not the cheapest option out there but, for me, the results are worth it.
D
David Kovacs · 3 reviews · Experienced 2025-08-07 ·
★★★★★
Great Product!!
Great Product - Fast & Easy
Well you would not think that a toothbrush could be reinvented to the point where you would say it is groundbreaking. But . . . the Feno is just that! Very simple to use and the it makes thorough brushing fast and easy. The brush has a simple interface without complicated 'guidance' on how to brush and where to focus. In less than a minute your teeth are very clean. Simple, smart and great results. It deserves even more than 5 stars! Also, the foam is very easy to use and effective and compliments the simplicity of the device.
Customer service has been amazing. It is sometimes too strong so I just turn it down but I love knowing it takes only 30 seconds and my teeth are getting cleaner than by hand!
Great toothbrush, brushes all my teeth on both sides all at once and my teeth feel better cleaned. The vibration seems to remove more plaque - my teeth feel more smooth. I also don't brush my gums too hard anymore with my new Feno.
J
Jonathan Michael · 2 reviews · Experienced 2025-08-06 ·
★★★★★
My Feno has really helped my routine
My Feno has really helped my routine. I've been able to brush more efficiently (and effectively) in a shorter time! Worth the wait!
Also, their entire customer service support team has been wonderful. Any issues have been promptly addressed.
Listennnn.
Even as a person with “buttons” while doing Invisalign this toothbrush is quite the arsenal in keep my teeth clean when I have to frequently pop aligners in and out. I can’t imagine how much time I’m saving! Additionally, my teeth are actually clean. Like — really clean. Cannot recommend enough.
K
Ken Fisher · 1 review · Experienced 2025-04-01 ·
★★★★★
Customer Service is outstanding
Customer Service is outstanding. The team is VERY responsive. Recommendations for improvement: 1. packaging of foam is unnecessarily difficult to open, 2. lack of included container for mouthpiece is unfortunate (and I heard they have them, but they're not able to be purchased because they're on backorder), 3. app interface isn't as user-friendly as it could be, 4. camera utility is technologically-limited (pictures are consistently "too dark" no matter the ambient lighting.)
I really love the Feno and how clean my mouth feels
I really love the Feno and how effective it is at cleaning your teeth. I’ve been using it about three months now and even my dentist gave me a compliment on my teeth brushing regiment on a recent visit. I highly recommend it.
Love my Feno. Saves time and cleans everywhere. Very happy with the purchase. Expensive but worth it. Invest in your health
r
ray seader · 1 review · Experienced 2025-07-30 ·
★★★★★
Synergistic teeth brushing
In today’s world we attempt to do everything fast, this product allows just that, one is able to make the most out of their time. Additionally my mouth feels fresher and cleaner than after a dentist’s cleaning.
K
Katherine · 1 review · Experienced 2025-08-06 ·
★★★★★
I love the way it cleans my teeth in 30…
I love the way it cleans my teeth in 30 seconds. It feels super clean and gets my gums too. To me it was worth the price!
T
Tom S · 3 reviews · Experienced 2025-04-20 ·
★★★★★
CON EMAIL BOUNCES INSTA NOT LINKED
CON EMAIL BOUNCES INSTA NOT LINKED. Took my money and no product, trying to get my money back from American Express!
Reply from Feno2025-05-07
Hi Tom, we're truly sorry to hear about your experience. This definitely doesn’t reflect the standard we strive for at Feno. It looks like our team connected with you about a month ago and resolved the initial issue—but if you're still facing problems, we want to make it right. Please reach out to us directly at [email protected] so we can assist you right away. We're here to help.
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David Tan · 1 review · Experienced 2025-02-05 ·
★★★★★
Great experience with there product
Great experience with there product . Happy teeth happy laughing .
Reply from Feno2025-06-16
Thanks so much for the kind words! We love hearing that your teeth are happy—and even happier knowing you're laughing too. 😊 If you ever need anything, we’re just a message away. Keep smiling!
This might be our favorite review yet 😄 We're so glad your smile is staying bright—and definitely not sunset-colored! Thanks for the love, and keep on glowing!
The product is great. My teeth and gums feel clean after using. They are responsive to any issues I might have.
Reply from Feno2025-02-03
Thanks so much, Mitch! We’re thrilled to hear you’re liking the Smartbrush. We always aim to be as responsive as possible, so if you ever need anything, just reach out. Appreciate your support!
