Oral Health Questions

The Smartbrush is currently not designed to work with braces, but please stay tuned as we look to optimize the brushing experience for those with braces in the near future. When the day comes for your braces to be removed, the Smartbrush will be an excellent tool to help maintain your newly straightened and beautiful smile.

We're excited to support your oral health journey, both now and in the future.

Yes, the Feno Smartbrush™ can function without a Wi-Fi connection. While connected features like the scanner won't be available, the basic brushing functionality remains unaffected.

You sure can. While we highly recommend using Feno Foam to maximize your results and freshness, the Mouthpiece will work with traditional toothpaste.

We've heard that parents are eager for a child-sized version of our Smartbrush, and we are working on one, but right now, our Mouthpieces are designed for ages 13 and older. Please don't share your Feno Smartbrush with your kids.

Join the waitlist to stay updated and be among the first to know when the Feno Smartbrush for Kids is available, including opportunities for early access.

You can track your Feno order anytime using our order tracker:
👉 Track my order

Just enter your order number and email used at checkout to see the latest updates on your shipment.

You don’t, but it can help speed up the process of resolving issues related to shipping. And in some cases where packages may not be covered by us, SavedBy can help where we wouldn’t be able to.

Yes, same as with any toothbrush. Feno cleans the front, back, and top of every tooth. Floss cleans between them. Keep flossing once a day.

Yes, Feno offers an affiliate program. You can find the signup page on our website in the Affiliate Program section.

We're excited to share that Feno is available internationally - so customers around the world can experience a smarter approach to oral care.

For international orders, please note that processing typically takes about 4 - 6 weeks. This includes receiving and analyzing your FitKit scans, preparing your order, and completing all required documentation to meet international customs and shipping regulations. Delivery time from our warehouse to your address may also vary.

As for pricing, it may vary slightly depending on your location due to regional taxes, duties, and currency adjustments. Once you log in and enter your shipping information at checkout, you'll see the most accurate pricing for your region.

Yes. When we size your TrueFit Mouthpiece, your FitKit scan captures your teeth from front to back, so every tooth—including your back molars—is accounted for when determining your fit. That means your mouthpiece is sized to provide coverage across your full dental arch, not just your front teeth. Just bite down gently and use slow, circular motions to help the bristles maintain contact as the Feno Smartbrush cleans.

While the Feno Smartbrush doesn't include a travel case in the current bundle, we do offer the Feno Hub- a sleek, compact charging and drying unit that doubles as a travel-friendly storage solution. However, the Hub is currently on backorder and is expected to return later in 2026. In the meantime, the Snap Charger included with your device is portable and designed for on-the-go use.

Our Customer Care team is available Monday to Friday, 8 AM to 5 PM PT. You can reach us any of these ways:

• Chat: Click the chat bubble in the lower right corner of this page.
• Email: support@feno.co
• Call or text: (323) 800-8564

To help us assist you faster, please include your order number and the email or phone number used at checkout.

Every Feno comes with a tongue scraper. Use it after you brush. It takes a few seconds and clears the film that a toothbrush head can't reach. In a clinical study, tongue scrapers beat toothbrushes at fighting bad breath, 75% to 45%.*

*Pedrazzi et al., Journal of Periodontology, 2004

To determine your correct mouthpiece size, please download our new app here:
👉 Feno App - iOS

Once downloaded, follow these steps:

1. Log in using the email or phone number you used when placing your order.
2. Locate the FitKit Scan button in the app.
3. Follow the on-screen instructions to complete your scan - you only need to do this once.

Note: if you are using an Android device, reach out to our team to generate a unique webpage link to complete your scan.

This scan helps us determine the right size mouthpiece for you, ensuring a secure and comfortable fit that works effectively with your Smartbrush.

If you have any questions or need assistance, our support team is here to help at support@feno.co.

If you have issues with your package, reach out to SavedBy directly here: https://customer.savedby.io/.

Please review their policies to make sure that your package can be covered here: https://savedby.io/policies

The Feno® Smartbrush is designed to be user-friendly and requires minimal technique for effective use. While the advanced technology 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.

To ensure your Smartbrush stays in great condition, here are some quick tips on how to store it after use:

1. Gently shake the mouthpiece to remove any excess water after brushing.
2. Place the mouthpiece in a well-ventilated area with good air circulation to allow it to dry completely.
3. Return the Smartbrush to the charger to keep it ready for your next use.

The Feno Smartbrush™ receives software updates through its Wi-Fi connection. When an update is available, follow the on-screen instructions on the device or in the Feno App to install the latest version.

To use the Feno Smartbrush, rinse the Mouthpiece under running water and spread a thin layer of toothpaste (we recommend our custom-formulated Feno Foam foaming xylitol toothpaste) along both channels of the Mouthpiece.

Then, insert the Mouthpiece into your mouth, fitting the teeth into the Mouthpiece grooves, and hit the start button. While on, move the Truefit Mouthpiece in a slow circular motion for optimal bristle contact.

Once your brushing cycle is complete, rinse the Mouthpiece and place the Smartbrush in the Snap Charger to charge the device.

For a visual guide, check out our tutorial video here to see the Feno Smartbrush in action.

Your privacy matters to us. Feno collects brushing and scan data to give you personalized insights and support your oral health journey. This data powers features like your Oral Health Report and brushing recommendations - but it's always stored securely and used responsibly.

For all the details - including what data we collect, how it's stored, and how it's used - check out our Privacy Policy. We're committed to transparency every step of the way.

The Feno Smartbrush doesn't use typical "vibrations" - it uses gentle translational movements designed to clean all teeth at once. That said, we know comfort is key, and you can adjust the brushing intensity both in the app and directly on the device.

🛠 Here's how to adjust the intensity:

1. Open the Feno App
2. Tap the brush icon (second icon on the app deck)
3. Select your connected Smartbrush
4. Choose "Brushing Speed"
5. Use the slider to lower or increase the intensity based on your comfort level

We recommend starting on a lower setting if you're new to Feno, especially if you have sensitive teeth or gums.

🎛 To manually adjust during brushing:

You can also adjust intensity in real time during a brushing session.

Just press the up or down button on the Smarthandle to increase or decrease the brushing intensity instantly.

🔄 Not sure if it's working properly?

If the movements still feel uncomfortable or you see a "bite pressure" warning, make sure:

• You're not biting down too hard (the brush should glide, not press)
• The Mouthpiece is seated correctly - it should feel snug but not forceful
• You're using the recommended Mouthpiece size

If discomfort continues, reach out to support@feno.co and we'll help troubleshoot or explore other Mouthpiece options.

To reset your Feno Smarthandle, follow these steps:

1️⃣ Make sure the device is on. If it's off, press the Power Button to turn it on.
2️⃣ Press and hold all three buttons simultaneously (Power, Up, and Down buttons).
3️⃣ Keep holding until the device resets - this may take a few seconds.
4️⃣ Once reset, the device will restart, and you can set it up again as needed.

✅ You'll know the reset was successful if the screen shows a QR code to download the Feno App. If you don't see the QR code, try again.

Note: It can be a bit tricky to press all three buttons at the same time - this is intentional. Some buttons are designed to be slightly harder to press to prevent accidental activation or shutdown during use. So if it doesn't work the first time, give it another try with firm, even pressure.

Let us know at support@feno.co if you need help!

Dispose of the Feno Smartbrush™ according to local regulations for electronic devices and batteries. Do not dispose of it in regular household waste.

If your Feno Smartbrush displays an error message, don't worry - most issues can be resolved quickly. Here's what to do:

🛠 Step-by-step troubleshooting

1. Restart your device
   Press and hold the power button for 5 seconds, then power it back on.
2. Check for updates
   Open the Feno App and make sure you're running the latest firmware. The app will prompt you if an update is available.
3. Review the error message
   Look at the exact message on-screen. Common ones include:"Wi-Fi not connected" → Make sure your Wi-Fi is active and try reconnecting in the app"Excessive bite pressure" → Ease up and bite gently on the Mouthpiece
4. Reset Wi-Fi connection
   In the app, go to Settings > Device > Reset Wi-Fi, and follow the steps to reconnect.

🔍 Still stuck?

Contact support@feno.co. We're here to help get you brushing again ASAP.

Yes! Both the Feno Smartbrush and Feno Foam are designed to be gentle for users with sensitive teeth. The Smartbrush features different speed levels letting you control the cleaning speed, while Feno foam is formulated without harsh abrasives to provide an effective yet gentle clean.

If you experience sensitivity, we recommend starting at the slowest speed and gradually adjust the speed to your comfort level. If you have any discomfort, please consult Feno for personalized advice.

The Feno Smartbrush can be used with permanent dental crowns that have been in place for at least 4 weeks, but only with the lowest intensity setting. We do not recommend using the Smartbrush with temporary crowns, newly placed permanent crowns (less than 4 weeks), or if you have concerns about your specific dental work.

As always, we recommend consulting your dentist before use if you have any dental restorations.

Absolutely! We stand by the quality of our products. Register your Smartbrush on the app to activate your 12-month warranty.

We will never share your information or brushing data. You can view our privacy policy on our website.

Feno Foam doesn't use fluoride because it relies on xylitol, a natural sweetener, to support enamel, boost gum health, and naturally whiten teeth, effectively providing key oral health benefits traditionally offered by fluoride.

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Feno Plus is our app subscription. Feno Membership is Feno Plus plus automatic refills delivered to your door.

Feno Plus

• What it is: App and insights only
• What you get: AI oral health scans, access to dental professionals, Amy (your AI assistant), trend tracking, and an extended 2-year warranty with Smarthandle replacement
• Price: $12.99/month or $99.99/year
• Billing: Monthly or yearly. Also available in the iOS app
• Smartbrush discount (FENOMEM100): Not included

Feno Membership

• What it is: Full Feno Plus app access plus automatic refills
• What you get: Everything in Feno Plus, plus a Feno Foam 3-pack every 3 months and a TrueFit Mouthpiece every 6 months
• Price: $20/month
• Billing: Monthly only
• Smartbrush discount (FENOMEM100): Included when you buy your Smartbrush with the membership

Not sure which to pick? If you want us to handle your refills for you, choose Feno Membership. If you only want the app features and prefer to buy refills yourself, choose Feno Plus.

*Prices for Feno Plus and Feno Membership may vary depending on your country and location.

No. Your Smartbrush gives you a full 20-second clean with no subscription at all.

Subscriptions are optional add-ons:

• Feno Plus adds app features like AI scans, access to dental professionals, trend tracking, and an extended 2-year warranty.
• Feno Membership includes everything in Feno Plus, adds automatic Foam and mouthpiece refills, and unlocks a discount on your Smartbrush.

Your brush, your choice. Add a plan anytime.

No, Feno Plus is the app only. If you want automatic refills, choose Feno Membership. It includes full Feno Plus access plus a Feno Foam 3-pack every 3 months and a new TrueFit Mouthpiece every 6 months.

If you'd rather subscribe to refills one at a time, you can still use our standalone plans:

TrueFit Mouthpiece subscription

👉 A fresh mouthpiece every 3 months. Subscribe here

Feno Foam refill subscription

👉 Fresh Feno Foam every 3 months. Subscribe here

Set it once and never run out.

You can cancel anytime. How you cancel depends on where you subscribed:

• Feno Membership or Feno Plus bought on feno.co: open the email we sent you about your subscription and click the link to manage your subscription. From there, you can cancel or make changes to your plan.
• Feno Plus bought in the iOS app: open Settings → tap your name → Subscriptions → Feno Plus → Cancel Subscription.
• Need help? Email support@feno.co and we'll take care of it for you.

All of those are Feno Membership. We've updated our plan names over time, so you may still see older names in emails or on older pages.

Here's a quick guide to the names:

Subscribe & Save, Smartbrush Membership, Smartbrush & Membership → Feno Membership, which includes:

• Full Feno Plus app access
• Feno Foam 3-pack every 3 months
• TrueFit Mouthpiece every 6 months
• Smartbrush discount (FENOMEM100) when you buy your Smartbrush with the membership
• Price: $20/month

Feno Plus (the app only), which includes:

• AI oral health scans, access to dental professionals, Amy (your AI assistant), and trend tracking
• Extended 2-year warranty with Smarthandle replacement
• Price: $12.99/month or $99.99/year

*Prices for Feno Plus and Feno Membership may vary depending on your country and location.

The FENOMEM100 discount only works when Feno Membership is in your cart. If you remove the membership, or switch to the Smartbrush alone or to Feno Plus, the code is removed and your total returns to the regular price.

To get your discount back:

1. Add Smartbrush & Membership to your cart.
2. Check that FENOMEM100 appears under the discount box. If it doesn't, type it in and tap Apply.
3. Confirm your savings appear before you pay.

Already placed an order without the membership? Email support@feno.co with your order number and we'll go over your options.

You may see a few different discounts at checkout, depending on what’s in your cart. Any discount you get will show next to the item and in the Total Savings line before you pay.

Here are the types of discounts you might see:

• Member bundle discount: When you buy your Smartbrush together with Feno Membership, you get a member discount on the Smartbrush. If you remove the membership from your cart, the discount is removed too.
• Automatic offers: Some promotions, like a free gum offer, are added automatically when your cart qualifies. No code needed.
• Promo or referral codes: If you have a code from a Feno promotion or from a friend, enter it in the discount box at checkout.

Things to know:

• Feno Plus does not include the member bundle discount.
• Prices may vary by country due to local taxes, duties, and currency.