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The SmartGuard Anti-Snore Device (sometimes searched as “Smart Guard” or SmartGuard Rx) is a boil-and-bite mandibular advancement device from SmartGuard Rx, Inc. of Layton, Utah. It is FDA-cleared as an aid to reduce snoring in adults, costs $69.99, and is backed by a 90-day money-back guarantee and a 1-year warranty. Its standout feature is a pair of separate upper and lower trays joined by swappable bars, so you can open your mouth while wearing it.
We bought the SmartGuard Anti-Snore Device and tested it ourselves; our hands-on test and video review are below.
One point of confusion to clear up first: SmartGuard sells two different products. The Anti-Snore Device is for snoring. The SmartGuard Dental Guard is a night guard for teeth grinding and does nothing for snoring. This review is about the Anti-Snore Device.
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SmartGuard at a Glance
| Type | Two-tray MAD, boil-and-bite, with interchangeable advancement bars |
|---|---|
| Maker | SmartGuard Rx, Inc. (Layton, Utah); dentist-designed |
| Price | $69.99 (with Premium Cleaner $72.99; 2-pack $89.99) |
| Guarantee | 90-day money-back + 1-year warranty (free replacement if it wears out within a year) |
| Adjustment | 6 bar sizes, each 1 mm different, for up to 6 mm of advancement |
| Fitting | Boil-and-bite with a molding aid; up to three molding attempts |
| Materials | Hard plastic trays with a softer EVA lining; BPA- and latex-free |
| FDA status | 510(k) cleared, K200657 (2021): “an aid for the reduction of snoring” in adults 18+ |
| Lifespan | At least 12–18 months, per the maker |
| Best for | People who want an adjustable MAD that doesn’t lock the mouth shut |
Prices checked on smartguardrx.com on October 24, 2026; they change, so check the merchant.
Pros and Cons
What we like
- FDA-cleared as an aid to reduce snoring, sold over the counter
- Six bar sizes give real adjustment, up to 6 mm
- Separate trays let your mouth open, which suits mouth breathers
- 90-day money-back guarantee plus a 1-year replacement warranty
- Up to three molding attempts, with free replacement parts if you can’t get a fit
What to watch for
- Setup is more involved than a one-piece device
- Small bars are easy to lose, and changing them is fiddlier than turning a dial
- Not cleared for teeth grinding; that’s a separate SmartGuard product
- Not suitable if you remove dentures at night or had an implant in the past year
- The maker’s storage advice (in a cup of solution) is less convenient than a dry case
Snoring Device or Night Guard?
SmartGuard started out selling a night guard, and that product is still on sale. Older reviews, including an earlier version of this page, mixed up claims from the two. Here is the difference:
| SmartGuard Anti-Snore Device | SmartGuard Dental Guard | |
|---|---|---|
| Purpose | Reduce snoring by holding the jaw forward | Nighttime clenching and grinding |
| Design | Upper + lower trays joined by advancement bars | Front-tooth guard that keeps back teeth apart |
| Price | $69.99 | $29.99 (two guards + case) |
| Warranty | 1 year | 3-year “no grind-through” |
| FDA | Cleared for snoring (K200657) | Separate night-guard clearance |
SmartGuard’s own FAQ says the Anti-Snore Device is not FDA-cleared for bruxism (grinding) and points grinders to the Dental Guard. If you both snore and grind, read snoring mouthpieces for teeth grinding before choosing.
How the SmartGuard Anti-Snore Device Works
Like other MADs, SmartGuard holds the lower jaw slightly forward so the tongue and throat tissue are less likely to fall back and narrow the airway during sleep (how snoring mouthpieces work).
The design is what’s different. According to the company’s FDA filing, there are two separate trays, one for the upper teeth and one for the lower, each a hard plastic shell over-molded with a softer EVA resin. The trays aren’t hinged or fixed together at the front. Instead, two small advancement bars clip into brackets on each tray and hold the lower tray forward. Because the trays are only connected by the bars, you can open your mouth vertically while wearing it, which the maker says improves airflow and comfort.
The bars come in 6 lengths that differ by 1 mm, giving up to 6 mm of advancement.
Fitting: Step by Step
This is a summary of the maker’s process; follow the printed instructions and the tutorial video on smartguardrx.com, because timings matter.
- Soften the tray in hot water until it’s pliable (the maker’s overview says about 60 seconds).
- Mold it using the included molding aid: place it in your mouth and bite down firmly to take an impression. The upper and lower trays are molded separately, and SmartGuard says the trays adapt to your arch width as well as your teeth.
- Check the impression. You can redo the molding up to three times. If you still can’t get a good fit, SmartGuard says to contact them for free replacement parts.
- Connect the trays with a pair of advancement bars.
Our general guide to fitting a boil-and-bite mouthpiece covers the technique that applies to SmartGuard too.
Choosing and Changing the Advancement Bars
SmartGuard’s FAQ gives a starting point:
- Most people start with bar 2 or 3.
- If you have an overjet (upper teeth well in front of the lower), start with bar 1 or 2.
- If you have an underbite, start with bar 4 or 5.
Wear a bar for a few nights. If you still snore, move to the next longer bar; if you feel too much forward pressure, go one shorter. The aim is the shortest bar that reduces your snoring comfortably. To remove a bar, turn it to a 90-degree angle to the bracket and pull it out; it’s easiest to release it from the lower tray first.
Compared with a dial-style adjuster such as SnoreRx’s numbered 1 mm scale, swapping bars is more hands-on, and the bars are small, so keep the spares somewhere safe. See how to adjust a snoring mouthpiece for the general approach.
Our Hands-On Test (Video Review)
We bought the SmartGuard Anti-Snore Device and tested it ourselves. The video below shows the kit, the fitting, the advancement attachments and our tester’s results.
- In the box: the mouthpiece, a fitting handle, the adjustment attachments, fitting instructions and a storage case. The directions give the hot-water time and explain how to advance your jaw step by step; there are six positions, and the instructions recommend starting at setting 2 or 3.
- Fitting: attach the upper part to the fitting-tray handle, boil water and pour it into a sturdy cup, and put both the upper and lower parts in for 60 seconds. Lift them out with a spoon or fork, place the upper part on your upper teeth with the handle, insert the lower tray, bite down firmly and press with your fingers until it fits well, then set it in cool water.
- Attachments: small pieces that clip onto the upper and lower parts; they advance the jaw and keep the airway open. Once the two you want are attached, it’s ready to wear.
- Results: our before-and-after recordings showed reduced snoring.
- Comfort: our tester found it comfortable when falling asleep, but woke with pain in the lower front teeth each morning they wore it. For that reason we don’t think SmartGuard should be worn by people who grind their teeth at night.
- Verdict from our test: it reduced snoring, but it may be uncomfortable if you snore and grind your teeth, and the small advancement parts are easy to lose.
One tester’s nights are a real-world example, not a clinical trial. Snoring varies from person to person and night to night, and a snoring app or fingertip oxygen recording is not a sleep test.
Comfort and Common Complaints
Feedback on SmartGuard is generally positive on fit and on being able to open the mouth. In our own test, though, our tester woke with sore lower front teeth every morning. The issues that come up are the usual ones for MADs, plus a couple specific to this design:
- Sore teeth, gums or jaw in the first week. SmartGuard lists tooth and gum soreness, jaw joint (TMJ) pain and excess saliva as possible side effects. Drop to a shorter bar if your jaw aches. See jaw pain from a snoring mouthpiece.
- A more involved setup. Two trays, a molding aid and six bar sizes take longer to sort out than a one-piece device.
- Small parts. The bars are easy to misplace.
- Bite changes with long-term use. SmartGuard warns, as with all anti-snore devices, that it may cause tooth movement or changes in how your teeth meet. Tell your dentist you use it.
- Yellowing. SmartGuard says storing it dry in a case can turn it yellow within weeks and recommends storing it in a cup of water with cleaner.
Cleaning and Lifespan
Rinse it thoroughly every morning. SmartGuard sells a Premium Cleaner ($17.99, about 110 cleanings), but it isn’t required. The maker says the device is designed to last at least 12–18 months, and the 1-year warranty covers a free replacement if it wears out sooner (proof of purchase required). Our cleaning guide covers what to avoid.
Who Should Not Use SmartGuard
Snoring can be a sign of obstructive sleep apnea. SmartGuard’s own FAQ says the device is not FDA-cleared to treat sleep apnea and tells anyone who suspects it to see a doctor. If you snore loudly and also stop breathing, gasp at night or are very sleepy during the day, get a sleep test first.
According to SmartGuard, don’t use it if:
- You wear full or partial dentures that come out at night, leaving few teeth to grip
- You’ve had a dental implant in the last 12 months
- You’re under 18
Crowns and veneers are fine if they aren’t loose. We’d add: check with a dentist first if you have TMJ problems, loose teeth, gum disease or central sleep apnea. See who should not use a snoring mouthpiece.
Is SmartGuard Worth It?
At $69.99, SmartGuard sits between the budget boil-and-bite devices and premium ones. What you get for that money: FDA clearance, real adjustability (6 bar sizes), a design that lets your mouth open, and one of the longest money-back windows we’ve seen at 90 days, plus a 1-year warranty. The downsides are a fiddlier setup and loose small parts.
How it compares with the mouthpieces we rate highest:
| Device | Adjustment | Price | Guarantee | Pick it if… |
|---|---|---|---|---|
| SmartGuard | 6 bars, 1 mm apart | $69.99 | 90-day + 1-yr warranty | You want to open your mouth and a long trial |
| SnoreRx Plus | 1 mm calibrated scale | $99.99 | 30-night | You want the easiest fine-tuning; our top pick |
| SnoreRx | 1 mm calibrated scale | $59.99 | 30-night | You want adjustable on a budget |
| ZQuiet | 2 fixed sizes | $59.95 | 60-night | You want no boiling at all |
The main reason to choose SnoreRx Plus over SmartGuard is the adjustment method. Both mold to your teeth and both move in 1 mm steps, but SnoreRx Plus changes position on a built-in numbered scale, so there are no separate parts to swap or lose. SmartGuard’s advantages are the longer 90-day trial and the freedom to open your mouth. Read our SnoreRx Plus review for the details.
If you’re a first-time buyer who mostly breathes through your mouth or hates feeling locked shut, SmartGuard is a good pick. In our own test it reduced snoring, but our tester had sore lower front teeth each morning, so grinders should look elsewhere. If you want the simplest adjustment, SnoreRx Plus is the one we rate highest.
Check SmartGuard price → Check SnoreRx Plus price →
SmartGuard FAQ
Is SmartGuard an anti-snoring device or a night guard?
Both exist under the same brand. The SmartGuard Anti-Snore Device is a jaw-advancing snoring device, FDA-cleared as an aid to reduce snoring. The SmartGuard Dental Guard is a separate night guard for grinding.
Is the SmartGuard Anti-Snore Device FDA approved?
It’s FDA 510(k) cleared (K200657, August 2021) for adults 18 and older “as an aid for the reduction of snoring.” It is not cleared to treat sleep apnea.
How much does SmartGuard cost?
$69.99 on smartguardrx.com as of October 2026, $72.99 with Premium Cleaner, or $89.99 for a 2-pack. US shipping is free on orders over $40.
What is the SmartGuard return policy?
Return it within 90 days of purchase for a full refund, with proof of purchase and the return/replacement form from the instruction sheet.
Which SmartGuard bar should I start with?
Bar 2 or 3 for most people, bar 1 or 2 if you have an overjet, bar 4 or 5 with an underbite. Move one size at a time after a few nights.
Can I use SmartGuard if I grind my teeth?
The Anti-Snore Device isn’t cleared for grinding, and our own test is a reason for caution: our tester woke with pain in the lower front teeth each morning, so we don’t recommend it if you grind your teeth at night. Talk to your dentist, and see snoring mouthpieces for teeth grinding.
How long does SmartGuard last?
The maker says at least 12–18 months, with a 1-year warranty.
Related Reviews
- SnoreRx Plus review
- ZQuiet vs SnoreRx
- SnoreRx vs VitalSleep
- Most comfortable snoring mouthpieces
- Best snoring mouthpiece for mouth breathers
How we researched this: our own hands-on test (see the video review), plus SmartGuard Rx’s product pages, FAQ and refund policy, and the FDA 510(k) summary for K200657. Last checked October 24, 2026.