Keyto Reviews

Based on 718 reviews
Key Eats Bars Bundle - 36 Bars
Deborah Kay (Singapore, SG)
Best tasting bars

I love these Key Eats bars in all three favours. They taste good, satisfy my hunger and don't spike my glucose. Have been giving them away to all my friends who love them too!

Keyto Breath Sensor
S. Ewalt (Statesville, US)
Very cool and super helpful tool!

I love the Keyto! Its very portable and packaged nicely. Its easy to connect to my phone (Android) and easy to use. The warm up takes a while, but that's not a problem for me. Based on what I'm eating and my macro tracker, it seems to be very accurate. Its way more cost-efficient than blood checkers and I find it fun to use! Highly recommend.

Keyto Breath Sensor
james gibson (Henderson, US)

Man it’s nice to have a digital monitor. I need to get keri sticks to calibrate to see if this is accurate. Sure is a lot harder to get in to keri’s is than I thought. But now that I’m here I’m gonna stay!

Keyto Breath Sensor
Timothy Lacey (Chesapeake, US)
Easy Keyto to Keto

I love this new innovative tool to let me know when I’m in Ketosis. It is so easy to operate that I bought one for my senior mom to monitor her Ketosis as well. Being in Ketosis is the only way I can keep my diabetes under control. Thank you!

Keyto Breath Sensor
Robert (Southbury, US)
Great Product, Very Motivating

Ive been using Keyto since April and I love it! Simple, Effective, and super motivating!!!

Keyto Breath Sensor
Andy Bennett (Riyadh, SA)
This Keyto system is Awesome!

I’ve been up and down with weight all my life. Plus or minus 5kg. As I’ve got older it’s been so much harder to lose weight. Tried so many things but this has been incredible. Within 6 days of strictly following the meal plan and really only light exercise (4-5km walk a day), I got my Keyto rating up to 6 and have lost 2kg already. I feel great, sleep well and am not hungry at all. I also just stopped smoking which made it more surprising as I was expecting to put on weight. Highly recommend this easy to follow and actually quite a fun eating plan.

Keyto Breath Sensor
EEProf (Beaumont, US)
Science-based, high tech way to monitor ketosis

I have been keto; i.e., following a ketosis-based metabolism diet, for quite some time. I lost over 60 pounds and at 65 years old my health markers show me to be at elite athlete level. For me, the Keyto is just pure convenience as I have used both blood test and "Keto-Stix" (urinalysis) in the past to monitor my ketosis level. The Keyto is just fantastic. You can use it anywhere and as often as you like (the single AAA battery has a phenomenal lifespan!). This is very important to me as I carb-cycle around my fitness regimen. I like to call it 'keto-surfing' because I will dip in and out of ketosis around my workout cycles. I also do a lot of biohacking and the Keyto is just perfect for homing in on exact carb levels for supporting muscle hypertrophy while minimizing lipid storage. I just can't say enough good things about this device.

For people just starting a keto diet with the intent to lose fat, the Keyto diet protocol cannot be beat. No calorie counting, eat until satisfied, easy food labelling (colors) and just good nutrition that includes fiber and micronutrients. The diet could not be simpler and the results are nothing short of spectacular and the Keyto provides that extra incentive to stay the course and drop the weight.

Keyto Breath Sensor
Joseph (Memphis, US)
Great way to keep yourself in check

It’s a super convenient way to keep track and correlate how food choices affect ketone levels. There are no consumables other than the battery which lasts a long time. Highly recommend for anyone living or trying to live a low carb lifestyle.

Keyto Breath Sensor
Rhyan Ellington (Fairfield, US)

Honestly I can’t say enough good things. As someone who has used ketosis for weight loss and lifestyle I love the fact that it lets you know right where you are from the start of your journey on. So when you’re feeling bad in the beginning it’s easy to look at your number and see exactly where you are and it gives you motivation to keep going. The app is incredible, lots of tips and helpful information. It’s easy to use, accurate and so much cleaner than strips. The other testers that use your breath don’t test properly and do not use the proper aspects of your breath for the most accurate reading. All in all, it’s easy, convenient and accurate. What more could you ask for.

Keyto Breath Sensor
Derek (Toms River, US)
Do yourself a favor and buy this now.

There’s nothing better than instant feedback. I’ve tried many “diets” and stopped because I wasn’t sure if it was “working.” This, however, is science. If you’re eating correctly, the body will do its thing. How do you know if you’re eating correctly, Keyto will tell you. Use the pen and you’ll know instantly if you’re in ketosis and continue to test to make sure you stay there.
The app has tons of recipe ideas. It may sound corny, but it’s fun.

Works great. Delivered as advertised.

Keyto Breath Sensor
Dukh Niwaran
Love this Keto Breath Sensor

This is really simple to use and I really like it. You need to get an app on your Smart phone and link to that to get a reading. It also takes a minute to heat up but counts down and asks you questions about your progress. There are no instructions how to use this in the box! You have to go to a website or an app to learn how to use it and when you are there they try to sell you a whole expensive program! However, the device is super easy to use and works great!

Keyto Breath Sensor
Sherry (Oberursel, DE)
Great device and App

I purchased the Keyto for getting support on my Keto diet, as I want to lose some weight and benefit from the positiv effect on health by eating just a little amount of carbs. It takes a few days to find out the best times to use the device, as the levels of Aceton varies during the day. F.e. the levels are lower after a workout. Beside this, the App provides lots of information for newbies and probably also for people already knowing something about the keto diet. There are lots of recipes, great food recommendations and a helpful plan for the first seven days, including a shopping list. Great App, great device and for me the best way to stay on track.

Keyto Breath Sensor
Tracy Becker (Mission, CA)
Love keyto

Hi I love my Keyto
Keeps me on track and gives me a boost of confidence every morning when. See where my Keyto levels are.

Keyto Breath Sensor
Philippina Schmuecker (Ulm, DE)
Correct lifestyle pays off

The correct behavior with 16-72 hours fasting daily and a maximum of 20 gram total carbohydrates (NOT NET CARBS BUT TOTAL CARBS) gives a great keto level all day long

Keyto Breath Sensor
kevin mcneil (Georgetown, US)

Keyto Breath Sensor

Keyto Breath Sensor
Hall Wongzaputt (Pattaya, TH)
The output from IF show that...

I don't eat Keto. I'm doing IF and tried the Keyto many times since I got it. When I do 18 hrs fast, it said that i'm in Level 2. 20 hrs at Level3. 24+hrs at Level4. I even do 40+ hours fast and got the Level 6 on the test. Even I don't eat keto, I'm still in ketosis. This device show me what I want to know so I can plan my eating time to get to the target weight. Great.

Keyto Breath Sensor
Tricia Barker (Mosier, US)
A must have for a Keto diet

I Love... love my Keyto. I have tried urine test strips, a cheap breathalyzer that was suppose to measure my ketones, neither one was very accurate, or consistent. Keyto is easy to use, and gives me a accurate reading. It has helped me track my ketone levels throughout the day, helping me understand my body better and what works for me. I highly recommend this product if you are starting a low carb diet and want to track your ketosis.

Keyto Breath Sensor
Elizabeth (Monmouth, US)
New Keyto breath sensor

I was excited to receive my Keyto Breath sensor . It worked well for 3 days then the button got stuck and I was unable to turn it off. It wore the battery down so device was dead the next day. On of button is very flimsy. I have to take the battery out after using it each time.

Keyto Breath Sensor
Cathy Robinson (Rindge, US)
Excellent device!

Very user friendly and accurate.

Keyto Breath Sensor
Mike B (Oceanside, US)
So simple and effective!

I love this convenient tool to keep me accountable. It's so simple to use and you can do it anywhere. If you are monitoring your ketosis levels. It's a no brainer!!

Keyto Breath Sensor
Denny (Rancho Cordova, US)

So far I have to say that I am quite impressed by the results of this sensor. Well different than using Keytone strips, I feel that with consistent use I'll be able to definitely determine whether or not I'm in ketosis.

Keyto Breath Sensor
Susan Yarber (Fort Lauderdale, US)

I love it! I also bought one when they 1st came out. LOVE IT!

Keyto Breath Sensor
George Longoria (San Antonio, US)
Keyto made easy

I appreciate the simplicity of the device. It’s easy to set up and use, and it makes starting the keto lifestyle fun. And the fact that you can test all you want without the worry of having to replenish expensive test strips is just icing on the cake no pun intended.

Keyto Breath Sensor
Luke (Islamabad, PK)
Great Keto tool

I started on my Keto diet with a “4” at my first measurement, and a few days later I measuring at 6+! I feel great on this diet, and the Keyto device keeps me motivated.