Keyto Reviews

Based on 670 reviews
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!

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.


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!

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!

Great Product, Very Motivating

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

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.

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.

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.


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.

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.

Great Product

Happy with sensor, easy to use, accurate,

New to Keyto

I like the device very much. It’s got a nice design, feels good in the hand, easy to use. I don’t like that it takes over a minute to warm up for each use, but that’s not too important over all.

Game Changer

Great to have reliable and convenient instant feedback on food choices and how they affect ketone levels. The results track well and are consistent with what the blood monitor readings are without the finger jabs and expensive supplies. Very convenient for work and travel and easy to use. Well worth the price.

Key(To) Better Health

Easy to use, accurate compared to the other tests I’ve used, and it encourages me to keep the reading pegged at max ketosis. Have lost 10 pounds in 3 weeks without being hungry once.

Great Way to See if you are in Ketosis

The sensor itself is great at informing you if you are in ketosis as well as the level. The app also lets you graph Ketone leves and weight info for timeline purposes and has a place you can input nutritional information so all is in one place. It's so simple and quick to use!

Sensor keeping me on target.

The Keyto Breath Sensor is simple to use and has enabled me to stay on my target and understand my journey into Keyto. It gives good information and the APP is user friendly.

Easy to use

Very pleased with this purchase. The app makes this the easiest instrument to use for finding your ketosis level.

Awesome little gadget!

Great piece of kit to keep on track of keto diet! Lost one star as have to pay a substantial amount to get full use of the app. Over all pleased with the breath monitoring device as is much more accurate than pee strips when you are fat adapted.

Great product

Easy to use and reliable measure!

Great for keeping me on track

Have you ever wondered if something really worked? Well this is not one of those things! I had my husband use it once, he is not on keto, register a one as expected. I got a hold of some carbs that I didn't know about (Taco seasoning) and my numbers went down. I would have never suspected they're being a problem if it hadn't been for the Keyto.

Love this thing!!

Amazing! Deserves More Stars!

Breath Sensor is a MUST have for anyone that needs to check Ketone levels! I love it.
Customer Service is the BEST customer service have ever dealt with online or anywhere else!
Fast response, got help and answers I needed!!

Am I in Ketosis yet?

I don't believe there is a simpler, faster way to find out. A simple, intuitive, and I believe accurate tool with a great app to help you see exactly where you're ketone levels are. Brilliant!

I like the instant check that I’m on track

Great motivational tool

This is a tool that is hugely motivating; keeps me on track

Yes thanks

This is a
Replacement. I lost my first one, I think I left it at the hotel. I don’t know what they will think it is but, oh well this is the new one. Used twice a day every day. Keeps me on track after 100 pounds loss.