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, 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.

Not at this time.

The Feno+ subscription does not include automatic refills.

However, it is available, and you can still enjoy the benefits of regular refills by availing our TrueFit Mouthpiece or Feno Foam subscriptions.

TrueFit Mouthpiece Subscription
Get a mouthpiece delivered every three months.

👉 Subscribe here

Feno Foam Refill Subscription
Stay stocked with our deep-cleaning foam.

👉 Subscribe here

You'll always have what you need - right when you need it.

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.

You can cancel your Feno+ subscription by reaching out to our customer support at support@feno.co, and we’ll be happy to help.

If you subscribed through Apple, you can cancel your subscription directly through your Apple device settings:

1. Open Settings on your device.
2. Tap your name at the top.
3. Select Subscriptions.
4. Find Feno+ and select Cancel Subscription.

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

SavedBy can help send a new package within 1 business day! Sometimes it may take longer, but in most cases, they are very quick to resolve any issues that arise.

SavedBy varies depending on the price of your order. It will automatically calculate once you begin to add items to your cart.

The Founders Edition Bundle starts at $299 USD within the United States.

For international orders, pricing may vary slightly depending on your location. This is typically due to regional taxes, duties, shipping fees, and currency conversion.

You can place your order directly at feno.co!

For optimal brushing results, replace every 3 months.

Join our Feno+ membership for discounts on Mouthpiece shipments and exclusive member benefits.

Subscription charges are only processed after the delivery of the toothbrush. If any unexpected charges appear, customers can request a refund by providing the receipt to our customer support at support@feno.co.

The delivery process requires FitKit scans to determine the appropriate mouthpiece size. To complete the scans, iPhone users can download the Feno App from the App Store here. After downloading, enter the order email address and follow the prompts to complete the scan.

For Android users, please reach out to support for a custom webpage link.

Absolutely, they are actually Ultrasoft! We have tested many iterations of the bristles and mouthpieces until we created the most comfortable and effective brush.

Not fully custom, but your scan allows us to match you with the best-fitting size from our range of 7 pre-manufactured sizes.

This helps ensure comfort, proper alignment, and an effective clean.

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 is charged through the Snap Charger, which connects to any standard U.S. outlet via the included power adaptor.

The initial charge for your Feno Smartbrush can take up to 4 hours. This is completely normal and ensures the battery is conditioned properly for long-term use.

You'll know it's fully charged when the battery icon turns green and displays "100%" on the screen.

🔋 Once fully charged, the Smartbrush should last up to 7 days with regular use.

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Yes! When your device is correctly charging, the screen will show "Charging in Progress" and a battery icon with a green outline. After a few seconds, the screen returns to the home screen, but a small battery icon remains visible to confirm it's still charging.

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.

Please check your spam or junk folder - the OTP (one-time passcode) email may have been filtered there by mistake.

If it's not there, it's possible that you've previously unsubscribed from Feno emails, which can prevent the code from being delivered.

No worries - just email us at support@feno.co using the same email you entered in the app. Our Support Team will check for any blocks and help get you signed in smoothly.

Here's a quick troubleshooting guide:

1. Reset the device to refresh the connection. Click here to know how.
2. Uninstall and reinstall the Feno App on your phone.
3. Make sure you're in an area with a strong and stable internet connection, ideally close to your Wi-Fi router.
4. Check that Bluetooth permissions are enabled for the Feno App in your phone's settings - this is essential for the connection to work properly.
5. Open the app and try setting up the device again. We recommend connecting to a 2.4GHz Wi-Fi network (not 5GHz) for the optimal connection.

If the issue continues, please reach out to our Support Team at support@feno.co - we're here to help!

Please confirm:

• You're using the official Feno charging adapter.
• The brush is correctly aligned on the charger (refer to the setup guide).
• You've allowed at least 30 - 60 minutes for initial charging.

Still not charging? Send us a photo or let us know - we'll troubleshoot with you.

The mouthpiece should snap into place with a gentle "click". If it's not clicking or keeps coming off, try removing and reattaching it with even pressure until it feels secure.

If the issue persists, please contact our support team. We'll help troubleshoot further and make sure everything is functioning as it should - and if anything isn't working properly, we'll take care of it.

Make sure your Snap Charger is properly aligned (Feno logo facing inward), connected to a working outlet, and magnetically clicking into place. The attached photo is for reference. Currently, the snap charger works in a specific orientation.

Here is a quick video showing how it is set up.

Still not charging? Contact us - you may need a replacement charger.

If your Feno Smartbrush is still showing a "Critical Battery" warning after being charged, here are a few things to check:

✅ 1. Check the charger connection

• Make sure you're using the adapter that came with your Feno kit.
• Double-check that the Snap Charger is properly attached to the back of the Smarthandle:The Feno logo on the charger should be upside down.The magnet should click into place.

🔌 Important: There is only one correct orientation for charging. Even if the magnet clicks in the wrong direction, the device won't charge. Refer to the image below for proper alignment.

You can also watch a quick video guide on using the Snap Charger here.

🔄 2. Try a device reset

If everything is connected properly but the warning still appears, a reset might help clear the issue.

Here's how to reset your Smartbrush:

1. Press and hold all three buttons (Power, Up, and Down) at the same time.
2. Hold for about 5 seconds until you see a QR code on the screen.
3. If the QR code doesn't appear, try the reset again - it can take a couple tries.
4. Once you see the QR code, try connecting it to the charger again.

💡 Tip: The buttons may feel a bit firm - this is by design to prevent accidental presses during use.

Still need help? Our support team is here for you!

Email us anytime at support@feno.co.

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.

The Feno Smartbrush is fully functional and provides a 20-second clean without needing a Feno+ subscription.

When placing an order, you can easily deselect the Feno+ membership and proceed without it - totally your choice.

That said, our Feno+ subscription enhances your experience by unlocking features like:

• Advanced oral health scanning and oral health reports
• AI-powered insights
• Access to dental professionals
• Exclusive discounts on mouthpiece and Feno Foam refills

We ultimately believe in offering choices that cater to different needs and preferences, ensuring that our customers receive the best value and experience tailored to their oral healthcare requirements.

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.

Yes! The TrueFit Mouthpiece was designed with comfort as a priority. The ultra-soft bristles are gentle on teeth and gums and are fused to a semi-pliable plate that adjusts to your unique dental arch. We offer seven mouthpiece sizes to fit 90%+ of dental arches. After purchasing the Feno Smartbrush, we need your FitKit scans to measure your dental arch using our app, which helps us find the right Mouthpiece size for you.

Not sure how to do your FitKit scans? Click here to know how.

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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No, the scanner in the Feno Smartbrush is designed to turn on only during the use of the Smartbrush. Your Smartbrush has a built-in Trust light to show when the scanner is on.

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.