Keyto Breath Sensor Review – Is It Worth The Cost?

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By Leslie Waterson

Reviewed by Juliana Tamayo, MS, RDN - Last Updated


The keto diet is everywhere these days. There are tons of keto products on the market, from Keto Chow to KetoFIRE, and many more that aim to help your body enter ketosis. When our bodies enter ketosis, they will undergo some changes; yet, how can we be sure? Sure, you can try those “test strips” that you need for your special “bathroom trip”, but that might not be the best idea for most. Another method is the blood test; and once again, that method might be quite uncomfortable for most. Plus, there’s a lot of people that hate the sight of blood. So what are you to do to test your body for ketosis?

That’s where the Keyto Breath Sensor comes in. You get instant accurate readings using just one puff of this sensor. And it will let you know of your ketone levels. You don’t need those strips or a blood test anymore. Plus, it’s less of a hassle to use. And you can take it with you wherever you go. It’s all part of meeting your weight loss goals and maintaining a healthy lifestyle when you’re going keto. So take a look at our review of the Keyto Breath Sensor and see if this product is right for you.

Keyto Breath Sensor

What Is The Keyto Breath Sensor?

The Keyto Breath Sensor is a small tool that you use to “breathe” to determine your ketone levels. When your body enters a state of ketosis, your breath will smell like something metallic and will have a great distinction from halitosis. Keto breath can also be “fruity-smelling” as well. As you blow into the sensor, you’ll get instant accurate readings of your ketone levels. 

The stats will be easy to understand and will give you a good idea of where you with your ketone levels. You can take this with you any time, anywhere. Plus it doesn’t require fancy equipment or complicated setups, and you can get your readings right on your smartphone using the Keyto Breath Sensor app. 

Keyto Breath Sensor package

Keyto Breath Sensor Advantages And Benefits

  • Instant, accurate readings
  • Simple to use
  • Battery life is ridiculously long
  • Android and iOS compatible
  • Helps keep you in the know about your ketone levels
  • Aids in your weight and fat loss goals
  • Easily portable
  • No test strips or taking blood


  • Might be expensive
  • May take a little time to calibrate for accurate readings
  • May be less accurate than blood tests

Who Makes The Keyto Breath Sensor?

The Keyto Breath Sensor is created by Key Eats. The brand is based on a program created by Dr. Ethan J. Weiss and Dr. Ray Wu. Both are specialists in the keto lifestyle and have extensive knowledge of the keto diet and the lifestyle that people have followed to lose weight and burn fat much quicker than other methods. Their Ketyo Breath Sensor is one of their flagship items that they have created as a way to help people meet their weight loss goals and keep themselves accountable while doing so. 

Aside from the sensor, Key Eats also sells different keto-friendly foods. These include but are not limited to bars, snacks, olive oils, low carb noodles, and more. On their website, they have sold the breath sensor as part of some of the package deals they currently have on sale. Up to this point, they have been able to develop a following with those adopting the keto lifestyle. 

Keyto Company Logo

Keyto Breath Sensor Features

The Ketyo Breath Sensor has a few unique features that make it stand out compared to other keto testing implements like urine strips or blood tests. The Ketyo Breath Sensor comes with four separate mouthpieces that you can use to perform your tests with. Just add one mouthpiece and it will be ready to use. The device is powered by a AAA battery, which can last you up to 600 breaths. Thankfully, it’s something that won’t suck up a lot of battery life. And it comes with a carrying case, making it easy to take with you. 

This is also very light in weight, weighing less than an ounce. Finally, you are able to test your ketone levels without the mess or the sight of blood. If you want accurate readings, you’ll get exactly that. Plus, you’ll get them in an easy to read and easy to navigate app that can be downloaded to your Android or iOS device. 

Keyto Breath Sensor features

How Does Keyto Breath Sensor Work? 

In order for this to work, you just simply blow into the tube for a few seconds and you’ll get the readings direct to your phone. It’s easy to read your ketone levels rather than having to figure out whether or not your body is in a state of ketosis or not. No more wasting time to figure out what your numbers are using the “old fashioned methods”.

Best of all, you save yourself less money buying this than you work ketone strips. Purchasing ketone strips will add up over time. Why settle for the hassle of buying more strips when you have the one testing tool right in your hand? 

Keyto Breath Sensor uses

Is The Keyto Breath Sensor Safe?

While there are no safety concerns and side effects regarding the Keyto Breath Sensor, it’s important to know the side effects of the keto lifestyle. Side effects include but are not limited to the following: headaches, fatigue, irritability, dizziness, lack of motivation, and “keto flu”. These are just some of the common side effects that have been reported. None of them are considered to be serious or life-threatening.

However, if you are considering the idea of losing weight by way of the keto lifestyle, it is important to consider talking to your doctor about it to ensure that it’s right for you. 

Where To Buy Keyto Breath Sensor And Cost

You can get the Keyto Breath Sensor directly on their website. The price will be $99. It is not sold anywhere else online. 

Key eats website

Keyto Breath Sensor: Is It Worth It?

Now you know our review of the Keyto Breath Sensor. If you are looking for an alternative to strips or blood tests, then the Keyto Breath Sensor is absolutely worth it. Even at the price that it’s going for, it’s a lot better to pay for it as a one-time thing rather than spend lots of money per month on keto strips. You’d be hard-pressed to find anything as close and as accurate as the Keyto Breath Sensor anywhere else. Plus, it might be hard to beat compared to other testing methods. 

Overall Rating:
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Leslie Waterson

Leslie has been passionately involved in the health and fitness industries for over a decade. She is constantly reviewing the latest scientific research and studies in order to take a research-backed approach to lifestyle optimization. Her main areas of interest include nutrition and supplementation. Leslie shares her findings on Fitness Clone to help other health enthusiasts choose the products and routines that will help them achieve their goals.