Rockville Jaw Exerciser Review – READ This Before You Buy

  • by Matt Phelps

Rockville Look Legitimate... But is it the Best Option Available For That Price?


Table of Contents

 🎬 Introduction
 🤔 What is Rockville?
 🛠 How to Use Rockville
 🪜 Rockville Resistance Levels
 😍 Does Rockville Work?
 ⚛️ Is Rockville Dangerous?
 🧪 What is Rockville Made Of?
 🛒 Where to Buy Rockville
 💵 Rockville Pricing
 💬 What Do Customers Say About Rockville?
 ❌ Pros & Cons
 🎄 Rockville Alternatives
 🏁 Conclusion



The biggest, most well-known type of jawline trainer, is the incisor-based type. Many medical professionals (and myself) believe that these are harmful to the jaw joint and teeth. Jawzrsize invented the category, and other companies made very similar products- like Rockville Jaw Exerciser.

   Rockville differentiates itself from Jawzrsize via branding and packaging, otherwise it's a very similar product. It was first jawline tool I ever bought, after getting targeted with a facebook advertisement.

   The Rockville exerciser is a well-made product with reasonable customer service. As far as incisor-based jaw trainers go... they're decent quality. But I have some serious concerns about this type of trainer that we'll get into on this page.



What is Rockville?

Rockville is an exercise device designed to workout to your jaw. Essentially, it's a hollow, ball-shaped piece of rubber. It's got 2 silicon moulds (one the top and bottom) that are formed to the shape of your own bite. It makes it more comfortable to use.

   The idea is to provide much more resistance than food or chewing gum, to workout the muscles of the face, neck and jawline. The main muscle it aims to target is the masseter of the jaw.

   The masseter is the strongest muscle in the body and won't grow without "adding weight to the bar" or increasing the intensity.

   I totally believe in the theory that Rockville is based on– that you can build the muscles in your face just like you can build your bicep, chest or quads. Whether Rockville is an effective (and safe!) way to do that... is something we'll talk about down below.

   But I have seen first hand that facial exercisers definitely can tone, tighten the face and increase the size of the jaw muscles. Which is something the general public still hasn't accepted. 

Rockville jaw exerciser

Rockville equipment with different resistance levels and shapes




How to Use Rockville

So you've bought one and now you're ready to try it... exciting! Most incisor-based trainers have strips that you need to adjust to your teeth. That's what those white pads at the top and bottom are for.

   It's worrying that Rockville doesn't say whether these strips are adjustable or not. I assumed they weren't because they didn't give any instructions.

   This type of facial exerciser is considerably (a nice way of saying extremely) risky for your front incisor teeth. Without adjusting the moulds, your increasing the odds even more that you'll chip or move a tooth .If you want to try and form the moulds, follow these steps that I've taken from a similar product's website.


STEP 1️⃣ – Get a small pot of water to boil fully. Then, place the Jaw Ball in that pot, gently with the help of a slotted spoon for 3 - 6 seconds

STEP 2️⃣ – Remove it from the boiling water and give it a quick shake to rinse off excess water

STEP 3️⃣ – Use a mirror to ensure that logo faces outwards and that you have the right side up. Line up all those clear biting strips with the top and bottom front teeth of yours

STEP 4️⃣ – Bite into the Jaw Ball and use sufficient pressure so that your teeth make an impression. Hold it for about ten seconds and remove it after rinsing under cold tap water for it to set


🏋️‍♀️ 😮‍💨 Now You're Ready to Workout 💦 🏃‍♀️

After you've shaped the device to your own teeth and bite, it's pretty simple. Just bite down on the silicone ball! You'll feel the extra resistance in various muscles. 

   The official Rockville website recommends biting down on these resistance balls 2–3 times for 10–15 minutes a day. As it becomes easier, move up the great resistances to build and strengthen your muscles even more. Let's look at the Rockville range of products now 👇




Rockville Resistance Levels

There's a 2 different types of exercisers they sell; an incisor-based, and a molar-based. Everything comes in one kit, and you can't buy them separately. Here's everything you need to know:



Rockville resistances

  • Incisor-Based Trainer (Black) – 50lbs resistance
  • Molar-Based Trainer (White) – 60lbs resistance

Who it's For: according the the website: "For all level users – great for men and women of all fitness levels our face and jaw exercise tools can reduce stress, minimize cravings, and help you look and feel more attractive. They’re also durable and easy to keep clean for reuse."

What I think: it's great that they include a molar-based trainer. They are safe and far more effective. Though 60lbs is too much to begin with imo. Something around 40-50lbs would be preferable.

The black incisor type is WAY too much resistance. It's dangerous (more on that later). Also, in the pictures on their website (see above), it's in the mouth the wrong way. How do you make that mistake? Have the sellers never even used it?




Does Rockville Work?

Depends what you mean. Does it work for what? Exercising your face? Improving your jawline?

   I'm going to assume the main thing you want to know, is whether Rockville improves your jawline and overall appearance. And the complicated answer is...

   Yes, yes it does. Your masseter muscles will get larger and this will give a stronger looking jaw. But it works out other muscles more. And the end result isn't necessarily a more attractive face.

   Most stress is placed on the temporalis muscle on the sides of your head. The wider your mouth is open when applying force, the more the temporalis takes over from the masseter. A larger temporalis muscle makes your head look wider at the top as the muscle starts to bulge horizontally.

   Rockville also stimulates the buccinator muscle which will ruin your chances of having the "hollow-cheek" look. It works out a lot of different muscles: there's hundreds of muscles in your face, head and neck. Every expression or movement you do "works out" hundreds of muscles. It's not about how many muscles you workout, but which ones are bearing the majority of the load.

   It does give you a workout. And that workout is a bad workout. I don't think it makes you look better. Deadlifting more than you can handle with awful form will still give you a good workout... but it will ruin your back as well. 




What is Rockville Made Of?

Hmm this part is a little worrying. They say on the website that their products are made with "BPA free silicone" – that's a good thing. 

   So it's all good right? They said it's safe? But they never say what the product is made out of or if it is FDA approved and tested. I would image because it hasn't been approved. If you have been through the hassle, you would be sure to state it on your website. For me personally, this is reason enough to not buy this product. But I'm concerned about ingesting harmful plastics and substances more than the average person.

   Almost all other jaw trainers are like this as well. Literally hundreds of cruddy imitation products have sprung up over the years. Most of them are drop-shipped straight from China, are made from terrible silicon and plastics, and have never been tested. Chinese manufacturers simply see an image of these tools and try to copy it.

   My point is: if you're going to put a piece of rubber in your mouth and chew it... I would want to know exactly what's in it.




Is Rockville Dangerous?

There are 2 main type of jawline exercisers:

  • ❌ Incisor-based – bite down with your front teeth
  • ✅ Molar-based – bite down with your back teeth

Types of jawline exercisersIncisor-based Jaw Trainer (left) use your front teeth to bite down. Molar-based use your back (molar) teeth to bite down (right)


Rockville comes with both an Incisor-Based and a Molar-Based type of jaw trainer. awzrsize was the inventor of this the incisor category when they released their first model in 2016. Since then, the Molar-Based types of jaw trainer have been invented. It is a much healthier and more effective option.


incisor-based vs molar-based

An incisor-based trainer on the left. And a molar-based trainer on the right



3 Ways Rockville and Other Incisor-Based Exercisers Are Dangerous

  • 🦷 Teeth – the incisor teeth were naturally designed for piercing and tearing. They are not suited for the high, repeated pressure of Rockville. In the worst case this can lead to chipped, crooked, or broken teeth.
  • 📐 Jaw Joint & Muscles – the degree of stress on the temporomandibular joint (TMJ) depends on how wide the mouth open and closes during exercise. Wide ranges of motion cause the TMJ to dislocate and re-adjust. This isn't the worse thin by itself, but add the constant load from Rockville... then it's dangerous and causes significant wear and tear to the jaw joint. Jaw pain, cracking, arthritis and tension headaches are some of the potential side-effects. 
  • ☠️ Toxic Materials – repeatedly biting into a toxic plastic or rubber will ensure you ingest those toxic substances. It's unclear what Rockville is made from or whether it has approval. The same can be said for most other jawline devices on the market. Make sure you check what the product is made of before you put it in your mouth.


Why Molar-Based Exercisers Are Superior 

  Molar-based exercisers sit on the molars. Because they're not big, the mouth only has open slightly during training. The range of motion is natural and the jaw joint was built to withstand this type of pressure. Chewing on molar-based is indistinguishable for the temporomandibular joint from chewing on a tough piece of meat.

This is what the flat surface of molar teeth was designed for.


How to Reduce the Risk of Damage When Using Rockville

  • 🛑 Do not chew if the bottom mould wears down
  • 🛑 Stop if you feel pain
  • 🛑 Never chew fast, always slowly and controlled
  • 🛑 Do not fully open your mouth and release your bite pressure until there is no tension
  • 🛑 Do not workout for more than 10 minutes a day




Where to Buy Rockville?

They're available in a few online stores. Apart from their official website, they're listed on Amazon and Walmart. 


Outside the US

   For everyone else, in Europe and the rest of the world, it seems like rockville is only purchasable from their website.




Rockville Pricing

The Rockville kit price varies depending on where you buy it. On its website, it costs $29.99. On Walmart, it costs $15.98. And on Amazon, I can't see because it's not available at this moment.

   Those prices seem reasonable to me. My main issue is how they set different prices across different platforms. I'd hate to buy something and then see the next day that I could have bought it for half the price!

Rockville price on their website

Price on Rockville's website


Rockville price on Walmart

Price on Walmart



   Oh! One more thing... the moulds? The ones that you bite into? They fall out. It's a really common issue apparently. Mine just fell out after my 10th use, and reading reviews and comments, that seems to be about the average number of uses you get before you have to buy more.

   It's really annoying because if you don't replace them it becomes too dangerous to use and the whole thing is worthless. You also can't buy the moulds by themself.



⚠️ Word of Caution: Don't Buy Cheaper Imitations! ⚠️ 

In my other jawline product reviews, I talk about NOT buying cheap Jawzrsize imitations you find on Amazon, Aliexpress or Alibaba.

I'm talking about Rockville here. It is one of those cheap copy-cat products made from a Chinese manufacturer and sold without testing them. They're made from toxic materials that have no business being put into your mouth, and they have no liability.

   With these sorts of things, it pays to buy high quality equipment from safe and trusted distributors. Check out the list of most effective equipment down below, under Rockville alternatives.

cheap jawzrsize copies

Avoid cheap Jawzrsize and copies




They have no shipping policy.



They have no return policy.




What Do Customers Say About Rockville?




  • Wow everything about this product is amazing. I purchased the Rockville Jaw Exerciser for my TMJ issues because everything I've tried before wasn't really doing the trick. Firstly the package came early which was a wonderful surprise! The packaging itself is classy, each component having its on compartment and box to keep the strengtheners in. The card has clear instructions of how to use and clean the strengtheners. I started noticing results after 5th day already, my jaw doesn't click anymore which makes my headaches and anxiety almost completely go away (please consult doctor if considering using for medical purposes). These people definitely know what they are doing and are so confident in their brand that if you add them on Instagram and let them know your purchase they'll even send you a free gift! This is an awesome company that I would recommend to anyone looking to lift their face, strengthen their jaw, or even just relieve stress. Thank you Rockville, will definitely be buying from you guys again!
  • Good quality product in material, answering customer service, clear instructions for use and good protective and storage equipment.
  • I love the product. They're a great company with fast shipping. I do recommend."




    • The product is ripped after few use you can clearly see in the video above.They have the worst ever costumer service and they didn’t even give the free gift they promised if I could I would even give minus star👎🏻👎🏻
    • Considering the price I wan t expecting much but it at least I thought it will hold for longer. considering I wasn't using it constantly ,also I don't if it's just me but I think that it's damaging my teeth and they are not that comfortable. I may change my review if they offer a refund or a new one. honestly I think the product works and also cheap.
    • The white gums don't last even 15 days and the main one lasted me 21 days. It does not deliver what it promises"



      🍊 AMAZON

      You can still fake Amazon reviews, but it's not as easy. Amazon has gotten a lot better at removing fraudulent reviews in recent years, so I think you can basically trust them.

         The average Amazon product has a rating of 4.4 stars. Rockville has a 3.8 out of 5. That's not bad. But it's not good either.

       Rockville rating

      Rockville is rated 3.8 out of 5 on Amazon




      A company's Trustpilot rating is their true rating. Because a Trustpilot rating can't be faked or manipulated – by anyone, no matter how much you pay. I don't know how they do it... but their algorithms and systems make it impossible to mislead future customers.

         Rockville doesn't have any presence on Trustpilot. So we can't get a truthful picture of their products and service. When a company isn't on Trustpilot at all, usually that means they are a very small company with limited sales.




      Pros & Cons

      ✅ PROS

      • 2️⃣ Comes with 2 Exercisers – with Rockville you get an incisor-based trainer and a molar-based. You can try both and see which you like best.


        ❌ CONS

        • 🌝 Leads to a Round Face – it stimulates and grows the temporalis muscle WAY too much. This can have a severely negative effect on your facial aesthetics by widening the top half of your head- particularly above your ears
        • ☠️ Made from Toxic Materials – based on the chemical taste, smell, and fact that it comes straight from China... we can assume Rockville is incredibly unhealthy to put in your mouth
        • 🦴 Harmful for the Jaw Joint – the Rockville device is too large and the jaw was not designed to apply high levels of force when it is so far open. Here I come TMJ, jaw joint arthritis, stiffness and clicking!
        • 🚨 Breaks Easily – the moulds that your teeth bite down into break quite quickly. Your incisor teeth are made for piercing after all. You either pay to replace them... or you continue using it without them and place even higher pressure on your front teeth
        • 🦷 Damages Your Teeth – this device applies all the pressure to your front incisor teeth. These teeth are made for piercing and tearing, NOT for grinding and applying high force like the molar teeth are. I'm surprised their aren't more stories of people damaging their teeth with Rockville
        • 🤮 Produces Insane Amount of Saliva – you need to keep a bowl underneath your chin to catch all the liquid that pours out of your mouth
        • 🔨 Breaks Almost Instantly – you hardly get the chance to even use the device before it cracks or the moulds fall out
        • 🤡 Looks Like a BDSM Ball Gag – you can't use Rockville in public... It looks too weird and it makes you gag

        Use Rockville anywhere, anytime?

        a Rockville tool being used while playing Playstation... (image from their website)




        Rockville Alternatives



        ✅ Best Alternatives 

        • 🥇 STEEL – Jawliners: these are the best molar-based jawline exercisers available today. They are both safe and effective. Start with the Beginner and move up to higher resistances as your jaw and face gets stronger.
        • 🥈 STEEL – Mastic Gum: this is 10x harder than regular chewing gum. It's a 100% natural tree sap harvested on the Greek island of Chios. It's a convenient way to train your masseter muscles while you are working, driving, studying or doing anything for that matter.
        • 🥉 STEEL – Jawline Gum: a mint flavored gum that has been created to be 15x harder than regular chewing gum. It's cheaper than mastic gum but loses its taste faster and doesn't come with the same health benefits.


        READ MORE: the 5 best Rockville alternatives




          🏁 CONCLUSION 🏁

          The best part about the Rockville jaw exerciser is that it includes a molar-based trainer. I've spoken extensively about the long term risks of the incisor-type. At least you'll get to try both.

             Rockville is just not an established company and their online presence isn't strong. That's not to say they can't be legitimate... but they have left out important material details on their website, and there is a lack of trustworthy reviews.

             Overall, Rockville falls apart quickly, isn't particularly effective, and has no customer support. There's far more effective, safer and cheaper jawline exercise devices on the market.



          🍀  GOOD LUCK  🍀

          Thank you for reading my review of Rockville Jaw Exerciser. If you enjoyed it, please share it with your friends - thanks!

          Matt Phelps- founder of Jawline Gum

             Matt Phelps

             YouTuber & Founder of STEEL



          P.S I've tested every jawline tool on the market. Here's the ones that work👇

          10 Best Jawline Exercisers in 2023 (Ranked)



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