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Customer Ratings & Reviews

Your price for this item is $299.99

Customer reviews

Rating 3.5 out of 5 stars with 44 reviews

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Rating by feature

  • Value

    Rating 3.4 out of 5 stars

  • Quality

    Rating 3.5 out of 5 stars

  • Ease of Use

    Rating 3.6 out of 5 stars

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Cons mentioned filter

59%would recommend to a friend

Customers are saying

Customers express satisfaction with the Breath Fat Burn Tracker's accuracy, saying it is comparable to a blood test. Many users also find the device helpful in monitoring their ketosis levels and weight loss progress. However, some customers complain about its slow performance and short battery life.

This summary was generated by AI based on customer reviews.

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.
Page 2 Showing 21-40 of 44 reviews
  • Rated 5 out of 5 stars

    Good tool for the price

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great tool for monitoring Ketone status and the impact of a variety of foods and exercise. Downside is a "slow" start up cycle. It can take a couple of minutes or more depending on frequency of use for the sensor to start up and be ready for use.

    I would recommend this to a friend
  • Cons mentioned:
    Battery life

    Rated 1 out of 5 stars

    DO NOT BUY!!!!

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    If I could give zero stars, I would. This think is loud, slow, and does not hold a charge.

    No, I would not recommend this to a friend
  • Rated 2 out of 5 stars

    Not ready for prime time

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    Posted . Owned for 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Not ready for prime time. App has constant issues with connection. Will try again in a few years.

    No, I would not recommend this to a friend
  • Rated 5 out of 5 stars

    cool device

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    cool device...helps you know if you're really burning fat or carbs

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Biosense

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Not as accurate as blood meters but os a great guide without pricking finger.

    I would recommend this to a friend
  • Rated 1 out of 5 stars

    not good

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    It stopped working after 5 times use, it supposed clean itself after each use, but it is not happening very disappointed

    No, I would not recommend this to a friend
  • Rated 1 out of 5 stars

    Didn’t work for me

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Even though I’ve been doing OMAD - One meal a day, hence fasting for 20 hours at least, I could barely get a 1 score to show up, aka I wasn’t in ketosis

    No, I would not recommend this to a friend
  • Cons mentioned:
    Warm-up time

    Rated 3 out of 5 stars

    Helpful while it lasted

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I learned to live with the excruciatingly slow warm-up, and used this device profitably for many months. It stopped working properly within the first year, and I returned it to the seller for free repairs. Now, after about 20 months of use, it consistently reads 0 even when I'm intermittetly fasting and can taste the ketones. Since the warranty has expired, I'm left with a $300 paperweight.

    No, I would not recommend this to a friend
  • Pros mentioned:
    Ease of use, Ketone levels, Weight loss

    Rated 5 out of 5 stars

    The Key to Weight Loss

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I've been trying lower carb diets for a while as an attempt to help with stubborn belly fat in my mid 40's. I never really knew if I was actually doing it right. I stumbled upon this in Best Buy and it's been a game changer for me. It's enabled me to alter my diet based on actual ketone measurements and I am finally finding success in weight loss. Don't think about it - just get it. There is no better, or easier way to check ketone levels. 15 pounds down :) Happy mom!

    I would recommend this to a friend
  • Rated 1 out of 5 stars

    Inferior product for the cost

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Do not buy. It is an inferior product compared to their competitor. I did not take it on vacation because I was concerned it would not endure the travel. It has to be stored in a package bag. It did not give a reading compared to it"s competitor. I only had the device for 5 days. before I asked for a refund, I have all the original packaging. The company refuses to provide a refund.

    No, I would not recommend this to a friend
  • Cons mentioned:
    Battery life

    Rated 1 out of 5 stars

    Quality issues

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I've owned this device since June 2021. It failed right at the 1 year warranty. It had numerous issues with the battery but when they "repaired" it they did not replace the battery but instead said that the sensor was just dirty and I hadn't stored it properly.... Well, I stored it in the bag that it came in! They said I should've stored it in the bag they sent it back from repairs in, except that was never originally packaged with the unit. It originally came with a fabric nylon storage bag with the companys logo on it and that is what I stored it in. My unit no longer holds a charge and it asks me to pair it to the app to set the time every time I boot it up. They knew about the issue with the battery but blamed it on the dirty sensor. Now I am actually out of warranty and there is nothing they can do. Goodbye $299! It's also outdated -- still uses micro USB and it has a low res display even though their product markups on the website make it look nice. Buy a Lumen or another device for the same price (or cheaper). This device has quality issues.

    No, I would not recommend this to a friend
  • Pros mentioned:
    Ketone levels

    Rated 5 out of 5 stars

    Biosense

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Great product to keep track of your ketones levels without the need of needles or urine strips.

    I would recommend this to a friend
  • Rated 1 out of 5 stars

    SAVE YOUR MONEY!!!

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Takes 5 to 10 minutes to open and according to many keto doctors including the renown Dr. Westman, you may as well use the urine strips and save $300. One of the purchases I regret the most and not able to return for refund. The Biosense site itself does not even allow for reviews because if more people read before buying they would lose $$$

    No, I would not recommend this to a friend
  • Pros mentioned:
    Accuracy, Ease of use

    Rated 5 out of 5 stars

    Dietitian Approved!

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This is simply a game changer and a whole new way to look at health. Extremely easy to use (way better than pricking my finger!) and way more accurate. I'm finally able to get real time insight into the foods I'm eating. Such cool technology! Bravo!!

    I would recommend this to a friend
  • Pros mentioned:
    Weight loss

    Rated 5 out of 5 stars

    Gamechanger Tool!

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I've been using the Biosense for about two months and it has completely changed my Keto journey. Prior to using it, I was always wondering if my body was in Ketosis or not, and constantly questioning if the work I was putting in meant anything. With the Biosense, I no longer have to wonder and can now even track how long I've bee in Ketosis and determine what's helped me get there and stay there. I'm down about 10lbs already, on my road to 50, and will be using Biosense all along the way.

    I would recommend this to a friend
  • Rated 1 out of 5 stars

    Buyer Beware - Complete Rip Off

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    The product has NO return policy. None. Complete pain in the *** to use. All sorts of restrictions on how long you have to wait before using it after a meal. Tried to get my money back after a couple uses - they told me it was a "medical device" and to go pound sand. Bottom line: If you spin the chambers on this product you are gambling away a couple hundred bucks on a novelty gimmick. I've gone back to using drug-store Keto strips. Cheap. Fast. Honest. This product was a complete rip off.

    No, I would not recommend this to a friend
  • Rated 1 out of 5 stars

    No way Jose.

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Such a piece of junk. I’ve seriously had to send it back in to the company TWICE so they could ‘calibrate’ it. Too many problems right out of the box. There are better products.

    No, I would not recommend this to a friend
  • Pros mentioned:
    Ketone levels

    Rated 5 out of 5 stars

    Validated my fat burn

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I used Biosense in conjunction my fasting routine to ensure that I was getting the most out of my 18 hour fasts 3x week. Without the tech I had no idea if I was burning fat or burning glucose. Having the ketone data helped me modify both my nutrition plan as well as my exercise routine to ensure I was in a deep state of fat burn for extended period of time.

    I would recommend this to a friend
  • Pros mentioned:
    Accuracy

    Rated 5 out of 5 stars

    Helps me decide what to eat!

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Unlike other meters on the market, Biosense gives me a really repeatable and accurate measurement. I can tell if I splurged a little more than normal or skipped my daily walk. It’s become an essential tool in my daily routine. I use it before each meal and that helps me figure out in real time what I should eat to maintain my weight loss!

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    The best tool for doing keto right

    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This is a great tool to use when you're on a keto diet. It takes some of the guesswork out of knowing how quickly body responds to changes in your diet. It's also encouraging to know when your body is in a fat burning mode even before you see changes on the scale or in the mirror.

    I would recommend this to a friend
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