The Truth Behind Non-Invasive Glucose Watch's Initial Readings 

I'm also T1D and really appreciate your testing here. I'm fortunate that we have access in UK to Freestyle Libre through the NHS, but people try to convince me that these watches are 98% accurate so finding tests like yours are really helpful. Many thanks.

I was getting all excited, ready to rush over to Amazon… with those first two readings 🙂. This is my first time watching your videos… thank you for doing this.

I've recently been plagued with offers for these watches. I wondered if they were worth the investment. Thanks for taking one for the team!

Thanks for this…you saved me $150 😊

Very good! A proper normal people test disclaimer earned my appreciation. Unfortunately, even a broken watch can display the right time twice a day and I believe that was the case. Thanks!

I didn't hear an explanation of WTH Decom is. Great video and I kept saying to myself this is the way I would evaluate this product. Clear, concise and no stupid excitement, music or noise.

Great video, love the dedication to testing it in real life rather than a lab with all the precautions that come with a lab environment!

Many thanks for your videos. I was so tempted by these cheap Chinese Glucose watches because I’m 81 yrs old and hate finger pricks. But we’re not there yet. I have clicked “subscribe” to your web site. Thank you so much.

I wonder if the watch style has a different lag on it. Get the graphs and see if numbers are the same but offset in time.

Thanks for doing a comprehensive set of test to prove that these things are designed to separate hopeful people from their money, they are toys, but I do appreciate your review of them and good job, be well. Larry

I think it's more a question of the tuning parameters applied by the manufacturer. (I'm a process engineer, so background in process control). I recently bought a watch from Shein, from a manufacturer in China, but all the readings I've had so far were in the "good" region. I wish I could access the raw data measurements, before they've applied their tuning factor.

Thanks! Keep looking for a noninvasive glucose monitor. I hate!! Paying the ridiculous pricing for CGMs

I really like that you pricked your finger and compared your Dexcom device to the watch, but in the end, I guess we will keep on waiting......

i take a soda pop to bring my glucose back up fast, good luck with your DB and thanks for the test

Thanks for posting this. My guess is that the manufacturers of these smart watches might be using skin temperature as a proxy measure of blood glucose level. Not entirely wrong or disingenuous in my view, because there is a complex but relatively proportional correlation between body temperature and glucose level (higher body temperature often reflects high glucose level and vice versa). The relationship is approximate at best; and the additional complexities relate to how our skin may or may not corelate directly to fluctuations of actual blood stream (body) temperature: different parts of the body have different skin temperatures; environmental (room temperature/humidity) would affect these readings; plus, stress (due to hypos or exercise nervous tension etc) have complex effects on skin temperature. All in all, I suspect that these smart watches are not entirely useless, but may be calibrated to perform best under optimal conditions that are seldom universal to all situations or all people. Best wishes.

Except for when you went swimming, did you have the watch on the whole time? Excellent tests. Really thorough. Thanks a ton for going through all of the trouble to do this.

That watch was looking promising for a second. As others said, when apple will have this our life's will probably be way simpler

Thank you for the testing, I am looking for a watch to replace me having to prick my finger. I no longer have insurance so I don’t want to buy supplies at full cost. Hope there is a watch out there that can do the job.

Thanks so much for doing this review of this product. I think eventually this technology will be perfected, but obviously not yet.

Tim Cook famous quote,”we may not be the first but we are the best.”

Awesome review! Thanks for being thorough and straight up :-)

Cucumber will settle your glucose level its amazing ❤ i take a whole cucumber every 2 to 3 days 3 cucumbers a week basically just enough to like eating cucumber So with some tortilla wraps or bread or as a side dish or just in slices

Maybe this is why Apple has not implemented it into a watch yet there is not a proper working sensor whether you like Apple or not, Apple does try to make a product that works as advertise

If apple invented such kind of device i will buy it no matter what will be the price

Thanks for the video. I've really been wanting one since I can't get a cgm. Oh well. Back to finger sticks.

Thanks for your efforts. Come on Apple sell us what we need.

thanks for the review. Fingers crossed a reliable will come

The BP on it is good as I compared it to the cuff bp. It was off a little.

I bought one of the $25 watches a couple of weeks ago. It is not even close but I had different results than you. It constantly reads 50-90 points low. I am wearing higher up on the wrist above my normal Casio watch. When I was wearing below the wrist there was no consistency or relationship to the glucose meter, it was always low. Now that I am wearing it very high its graphs in the program match my ups and downs, just way low. Like you, I am waiting for apple or someone to bring one out that is correct so I can hand my money to them. FWIIW - The BP, heart rate, spO2 and temp seem to be pretty close though the sp02 readings have none in them (you will see a low reading and re-do it and get the right reading 10% of the time)

My understanding is that there is a delay where blood glucose levels in the blood take time to show up in the fluid beneath the skin on which non-invasive CGMs rely. This is why the watch in the video "lagged" behind the cappilary blood glucose monitor, showing reading that were the case a while ago as opposed to the test time. . It just takes time for the changes in the blood glucose level to show up in that subcutanuous fluid.

Just like every other "glucose watch" it's off way too much for me. I'll just stick to my glucose meter.

Ah, thank you for your quick response. It's not bad for the price. I ended up buying a lot cheaper. I bought 10 and sold it. Now I just ordered more. Thank you soooo much for your reviews. We need people like you. Amen. God bless.

At 1:26 : " ... now let's get ready to separate HYPE from FICTION ... " Lost me there.

The advertising on these non-invasive glucose watches are incorrect. They do not monitor "blood" glucose. It appears they monitor Interstitial fluid (IF) glucose. IF is the fluid around your cells and because it contacts capillaries it is an absorber of glucose from the blood. However, this means there is a delay due to that absorption process. It does not require transport as cells do for glucose to get into the cells. It is an absorption so it does happen faster than cell glucose levels. So blood is the source and IF is a relatively quicker absorber and cells require a slower transport. IF glucose monitoring does work but the source must be stable or a time factor considered. Notwithstanding a bad sensor, circuitry, or programming code of the watch itself.

Great video, I have always been a little skeptical about non-invasive glucose monitoring, hopefully it will get better, but who knows. If Apple ever does get an accurate watch, it might be the only reason I would leave the Android Ecosystem, but that's a big IF.

Thank u SO MUCH. I HATE needles/pricking. U saved me from wasting money. This is depressing. It would be nice if this is all we'd have to do. I tried researching & to no avail. Thanks to you, I now know.👍

Can't wait for one that is fairly accurate! Thanks for the post so many of us will not be taken advantage of!

Every video that I’ve seen that includes this type of function in a smartwatch review never speaks to whether or not it’s accurate. Thank you for finally getting some data out there. I would’ve loved to have done it myself, but just couldn’t waste the money on Strange branded watches.

I would expect Samsung to hit the market first before Apple with a BG sensor on a Galaxy watch. I will have to switch if it happens but I prob won’t be overly excited about it

Gutted as want something like this for my son Thanks for the upload.

At first, I was skeptical, as I use Blose on my G5 watch with my G7, and it works fine. Then hopeful with the first 2 results. Then back to whatever. A $150 non-invasive option for monitoring sounds wonderful. It's just not there yet. Changing the sensor once a tenday is fine for me. It rarely hurts anyway.

Please do a review of the MymonX glucose watch

Thank you for the review. Like you, I'll be waiting for something good and new.

Thanks for the information

Could be interesting to do a longer study on these watches. Maybe it's just that the readings, trends and graph are severely delayed compared to CGMs which are already 10-15m behind ? If that's the case, the watches could be somewhat useful to get a vague idea of bg trends during the day or night for someone that does not have access to CGMs ?

from what i've seen from people reviewing the watches, it appears they have a HUGE delay in following the current trend of your blood sugar. like it takes a lot longer for the highs and lows to be readable in your surface skin the way the watches attempt to read the glucose.

Where can I buy a dido glucose watch? I don’t see it on Amazon.

Thanks for sharing, I don't really think a watch can be that accurate when it comes to reading, glucose in your system. The price is a little steep for me anyways.

Here in the Philippines cost me less than $16.

Great video. Tyvm. I'm still looking a way to test my sugar levels while sleeping.

Maybe the american unit conversion is not malfunctioning? Try testing it for a week atleast. Great video nonetheless keep it up!

I am buying any watch that will get accurate numbers of My Blood Glucose, Blood Pressure, Heart Rate. Optimistic that Apple will hopefully make it to us one day

Even a stopped clock is showing the correct hours twice a day...

Why do some devices that measure blood glucose require a prescription and others don’t?

Thank you so much for this video; very well done and very helpful information.

Great video. Glad to see an actual comparison with a real meter, not just comments.

Nice job Sir. I tnink they will be soon there. Thanks ever so much.

Thanks Man I brought one from Ali Express is totally False reading all time comparing to My old fashioned of checking BS. Please Apple or Samsung help I don’t like stabbing my Finger it’s really painful 😅

Thanks for the video, really useful and interesting that it is so far out with its readings. The instructions being so vague would be the first red flag for me, plus I would expect a device like this to need some degree of calibration, both initially and ongoing, to ensure accuracy. Can't wait for the day when Apple release a watch that does Bg readings because they will have tested it to destruction and will get FDA approval.

Thank you. You saved me $150.

I have the cheap version of one of these. Looks to me as though the daily variation pattern doesn't vary from one day to another, despite what and when I eat. Superficially convincing and absolutely not reliable. That also sprays doubt over all the other data it produces.

You need to know one very important piece of information. The difference between Accu Chek and a watch is huge. Accu check measures sugar from the blood, while the sensors measure from the intercellular fluid. When I reported a malfunction on my Libre2 sensor, they told me that 10 minutes must pass between the blood sugar measurement and the measurement on the sensor. So I believe that this watch also shows its value well, but you should find out on which principle it works. It's a shame that they didn't write it in the instructions for that rather expensive device.

Depends on the use- your research was not specific to the population addressed, This watch seems to be of great value for early Dx dm2 or Diabetic type 2 early stages, in other words, not seeking to discover Hypo or severe glycemic values. I would not use it on a population the detection of critical values is necessary, I suspect that If you are someone with hyperglycemia stable, not brittle, or not leading to life life-threatening situations, if there is any doubt, I would confirm with the more invasive monitoring. You are right, more sensitive and specific devices should be developed. Understanding it will creep the price initially 3- 5x.

Im not even diabetic, but this was fascinating.

One quick question, did this watch have an allowance for manual fasting blood sugar input? If so, that might have improved its predictive accuracy towards glucose spikes at least. But I doubt it would be able to predict hypoglycemia or lows. Individual glucose curves and dips are probably far too unique and difficult for the algorithm to properly map, I'd imagine.

I fear this is the 21st Century "Search For the Holy Grail."

Great video. I got mine for less than $50

I’m not diabetic but want to monitor my sugar levels to make sure they don’t get too high. I have been looking at these things but so far, none I see tested seemed to work at all. QUESTION; Glad you can change to mg/ dl, thanks

Thanks for the review! Excellently conducted. I have to agree 100% these watches are dangerous for diabetics to rely on, you would be better off testing urine sugar like the 1950s, to see if the renal threshold was exceeded (i.e. over 160-200 mg/dl+) than to rely on these watches. I have the F57-L watch, which you reviewed earlier. It basically is a random number generator for glucose, never below 6 mmol, or over 7 mmol/L, either a built in design flaw or just outright practical joke, a toy. I also got the Filiekeu F57, both of which use the H Band App. To be fair, The F-57 Filiekeu has some good features such as apnea detection and Sp02, and is very much like this watch, only it was 40 $ not 150 $. But, I think all these H band paired app watches use a similar proprietary algorithm day to day, baked into their equations with pre-programmed humps (assumed glucose spikes after each meal, at 10:30 AM, 3pm, and about 8 pm.), but not tracking real world actual spikes. So technically, that is a kind of fraud, intentional or not. However, that aside, the semi redeeming feature is that the F-57 and some of these other watches allow a manual input of your estimated fasting glucose, which then allows the pre-programmed spikes to somewhat better approximate real world curves better (glucose tends to spike 50%, after meal, and dip 50% at night or during lows, above and below the average glucose level, as a rule of thumb). When I averaged out my blood glucometer readings to the F-57 Filiekeu I get about a 85.5% accuracy. I am not diabetic, My highs postprandial 1 hour and 1/2 hour respectively were 127-144 in my glucometer, and 141-157, on the Filiekeu (between the normal mode, and custom adjusted modes at 90 and 99 mg/dl fasting). In the fasting state, which for this watch is pre-programmed at before 9 AM, again at 12 Pm, 4-6 pm, and after 10 pm, I have also tested 2 other people, and got relatively accurate results *to their known labs. They had fasting glucose of 79 and 110 respectively, whereas mine hovers between 90 and 99. In any event I believe these watches at best can give a ballpark, for NORMAL range blood glucose individuals, but can be wildly off for anyone with hyper or hypoglycemia, AKA diabetics. All and all, maybe in time the technology will improve, and it def. is intriguing, but until the proprietary algorithms can be cracked, and allowance for customization (such as Artificial intelligence taking into account all the variables of BMI, Blood pressure, Age, pulse wave, HRV, HR, temperature and Sp02, the last time you ate etc. ), these infrared light watches are going to be shooting off target. When I averaged my results out, between normal mode and custom input mode on my F57 Filiekeu watch, my average eAG was 102. approximating an A1C in the ballpark of 5.2, which matches my glucometer derived A1C estimates (5.1 -5.4) on two different glucometers I have. So for me, the F57 is about as accurate as a crappy glucometer 85% accurate, whereas FDA allows glucose meters to be as inaccurate as 80% .

Wow! Many thanks bro!

I would not buy an Apple watch. So if the Pixel Watch or the Galaxy watch added this accurate feature. Then I would buy that.

This was great. Thanks.

Interesting review, subscribed. Afraid I might be getting close to pre diabetes cutting sugar and starting alt. day fasting. Guess I'll have to wait for Apple or Google/Fitbit watch.

An interesting test with this watch would be have been to wrap it around a paper towel roll or something that’s like a human wrist, but isn’t. My skeptical thoughts are that it’s just throwing numbers at you, hoping that they’ll be close enough for enough of the reading comparisons to make it look like it’s doing something. If it says a roll of paper towels has a BG level of 127, you know it’s all snake oil (snake watch?).

Thank you for sharing this really helpful video. Really well done. Greetings from Germany

Thank you

I live in the Philippines and the link doesn't work for me. Can you please name the brand and model name so I can check if its available here? Then again... nevermind. 😂 Thanks for the review.

Thanks for taking another one for the team. lol

Seems to have disappeared from the Amazon store, even their cheaper watch. So not sure what happened but searching in a few other outlets it's gone from there too!

I have had H Band products before needed for BP monitoring , I used the device, and then actually got round to doing a cross comparison to the actual cuff, the difference was terrible , i was still really high where the H band had identified I was in the much lower range. No diabetes trained professional has ever notified me to even give these through the skin models a go, . given the UK Driving regulator wont actually recognise CGM yet, there is NO way this sort of idea is going to be anywhere compliant. Pretty much a snake oil product for now , borne out by that fact that if the R&D of apple cant get this idea to an accurate delivery , what does some Asian supplier have any chance to be reliable . I cant take the risk , its too dangerous to rely on this

Surely you should be able to calibrate it to a good location of a major blood vessel. Contact & location must be vital for a good reading. Or is it just a toy?

Thank you for this! I was looking at getting one of these but now im going to save my money. If apple came out with one i would be more likely too trust it because they are not going to put 💩 on their inventory.

Somehow all these DIDO watches are taken offline worldwide. It is not even on aliexpress anymore.

My experience with CGM’s was similar, with unreliable data the first day or two, loss of signal or errors, due to large swings in BG, and then hard errors the last couple of days, that prevented me from getting a full 14 days of use from the sensor.

Never use alcohol to clean your fingers to check your blood glucose levels,this is not the right way.Just wash your hands with soap,dry them well,than wipe the first drop away and use the second drop to measure your blood glucose levels. This I know, because I'm a Type 1 diabetic for more than 20 years.

We all want it to work but its just a scam. It can guess pretty much taking into account the activity the watch registers. In order to do a good test, you should not even wear the watch when doing the activities. In order to do a good test.

Thanks for doing the research!

Thank you for this video.

They are mostly junk for catching big swings. They take a while to catch up to reality. At the same time last summer I was supposed to refill my sensor script a couple of days before going away on vacation. Turned out the script was expired and they needed a refill, so the sensors would not be available on time. I got desperate then saw the watches on Amazon. I figured in an emergency, I could give it a try. Good news, it did help just enough. Bad news it really dragged on catching my one low blood sugar event on vacation. Good news there was I have decent awareness so, took care of it before things got really bad. So, these can be vaugly useful in a pinch. Just don't make a habit of relying on them. Hopefully, we will soon see better sensor tech.

Any suggestions on which non evasive watch to buy ? Thank you for your time

Don't you supposed to wear the watch inside of you arm to get more accurate measurements?

Good product review!👏👏

As a diabetic that didn't know I was, it nearly killed me

8:15 84 … is the battery percentage of the watch 😅

Great job

Glucose monitors are pretty accurate. Not an issue. They are close enough

Don't worry Apple will save you one day with a savoury price 😂

$150 is expensive you say? You do know what a really expensive watch costs?

The Dido watch looks like it is a partial pirated version of the Diamontech D-Sensor watch. The watch is still being developed and hasn't been approved in either the EU or the United States.

So strange that the model number or company isn’t stated in the title or the entire description unless i missed it and the link I thought would take me to Amazon to purchase the watch is a dead link. Is this a real watch or an imaginary promo? Idk.