Lingo Continuous Glucose Monitor (CGM) & App. Made by Abbott. Know the Impact of What You Eat.
1 Lingo biosensor lasts up to 14 days. Requires iPhone 11 or later. US Only

If this sensor is useful or not, I will never know... because I could not get it to work. To apply the sensor to the arm is easy and you will not feel a thing. To install the app is a total different issue. I have a Samsung Phone and I use this phone exactly for the reason intended by Alexander Graham Bell and nothing else... like most seniors my age. I do not care one bit for all this nonsense and pretend functionality on a modern phone. Actually most phones are virtually unusable because the keyboard is too small for old fingers. But I did managed to "register" for a Google account. They of course ask me all sorts of questions which are none of their damn business... but I suffer with dignity so I go to the Google Play Store and search for "Lingo" and installed the app. The app started with asking me all sorts of questions... again, none of their business. I paid for the sensor so I should be able to use it, but no... they are more interested in my info. Then 10 or 20 pages later (i did not count) finally the page which read: Ready To Scan... I did hold the back of my phone directly onto the sensor which I had already put onto my arm. and .... nothing... then the message... Pairing Error... I tried numerous times Then I called the support line and as expected a gentleman with a heavy indian accent ( you recognize the accent when they call you and try to con you out of your money, never pick up the phone when you do not recognize the number). Obviously the guy talks too fast, uses unnecessary words and you cannot understand a thing. This went on for good 1 hour and nothing. among other things, he asked me to delete the app, reinstall this and then search for a red dot... ??? what red dot??? I still do not know what he meant. Anyway I told him, that I cut my losses and tell everybody about my ordeal. Then he suddenly offered me to replace the sensor. Very well I am down $50 already, might as well... arrives in 2-3 days, meaning 4-5 days because of the weekend. Why is there no "app" for this sensor on a PC. After all A PC has a screen I can actually see and a keyboard which does not require baby fingers. And for Pete's sake, do not ask me all these dumb questions, which are none of your business. If the replacements ensor works, I will try it... but then never again. Simply measure your morning fasting BG like before and that is that. Minute to minute updates are superfluous and expensive technology and a pain in the rear. 12/21/25 1:14pm Important update. I did not want to wait for the replacement and ordered another one yesterday from Amazon same day delivery. This one worked, but did not give me any reading for 1 hour and afterwards it was 20 points too low compare to the finger stick (73, 92). however this morning it was a lot better, In fact just now it reads 92 and the contour next fingerstick reads 95. I am more than happy with that. To be sure I get some benefit from this device... after all I learned that overnight my BG dropped to 55 for a brief moment... I seriously doubt that. All you can see trends, and I am lucky with this one, it is even accurate.... but I am an EE and I did work with large continuous datasets which were contaminated with large random errors and judging by the graph, it looks very much like a data set processed using a Markov Process. This is a mathematical process to get the best up to date measurement even when the whole data set is contaminated with random errors. But there is no free lunch in mathematics, nothing beats accurate measurements, no amount of math and statistics will make it better, even when it appears like that. In the moment I am happy... lets see, if the other reviews have a point. besides, why do you want to measure something you already know? Sugar and refined carbohydrates spike your blood glucose... its common knowledge... don't eat junk food and you do not need a CGM, Everybody who wears a CGM or reads this post, has already done the most important thing, which is educating oneself about nutrition... everything else is superfluous. Important update 05/Jan/2026 I am on my 2nd sensor. They last only 14 days for whatever reason, most importantly I guess, the glue will not stick much longer than that, probably the skin will secrete oils which dissolve the glue??? The good news was, that removing the old sensor was easy and it left no mark on my skin other than a tiny hole where the sensor was inserted. Unfortunately, the second sensor is also about 20 points too low, relative to the test strip. Of course one could argue that the test strips read 20 points too high, which I seriously doubt. Consecutive testing with test strips (Contour Next EZ) show readings within 5 counts of each other using brand new test strips. Overnight I get readings of 55 with the CGM, which is utter nonsense, because I am a recovering type 2 diabetes patient... even a reading of 75 overnight is hard to believe. The only useful thing I have discovered is that overnight my BG drops significantly. Morning glucose measurements are virtually useless, because of the classic BG spike after waking up. As soon as you out of bed, the BG is already on the rise and it can go up 30 maybe even 40 points within minutes and you have no way of knowing on which part of the curve you are measuring. So again, I have a warm feeling that maybe I have conquered my insulin resistance, just add 20 points to whatever the CGM tells you and when this is under 80 during the night, you maybe ok... still avoid carbs for the rest of your life

This has been so enlightening! I’m a thin, very active, and very healthy eating 60 year old with an A1c just barely in the pre diabetic range (5.7) per my last physical and lab results. I was shocked. So I bought this to see if I could find out when my sugars were high and after what foods. Well I was shocked again to find out how high my sugars went and how frequently I get big swings. I’m on my 4th day and have finally figured out through trial and error my diet and activity level and timing to give me a good Lingo score. I found that I need to eat less carbs (even though all were whole grain) and less fruit (I love fruit!) and only after some protein but mostly that I need to eat smaller meals and to stay active for about an hour after each meal to keep my sugar levels stable and from peaking so high. Yes it’s a little bit of a hassle but something I can do and so much better than medication or worse - having diabetic complications down the road. I would never have known without being able to have a constant monitoring system! It’s very easy to place the monitor and painless. And the app is easy to use. This will change my behavior and prevent so much pain and problems in my future. I cannot recommend this high enough if you’re pre diabetic or if you just want to have your eyes opened regarding what your sugars are on a real time basis. The best fifty bucks I’ve ever spent! It’s now 7 days later. The monitor stopped working on day 6. I called Amazon and they gave me a full refund without any problems. However, I still think the information was life changing for me. I would have liked more time to try different foods to see my body’s response, so I will try another one. I’m going to keep my rating at 5 stars because of how incredibly enlightening it was even though it only lasted the 6 days.

I'd give it 5 stars for the valuable info the CGMs provide in general and ease of use with the Lingo app and pairing. I learned a lot about my eating habits and how specific foods you eat, the time that you eat, and how you pair foods together impact glucose levels, which was very valuable information in staying healthy and for weight loss. But the Lingo device itself gets only 3 stars because it's extremely glitchy - I had to send one back because it stopped working properly midway (stopped registering any Lingo counts and customer service rep couldn't fix even with a device and app reset). I've also had odd readings - i.e, 1 keto cookie and 1 keto chocolate square sent my glucose sky high to 200 while a night of 2 glasses of red wine and a fairly heavy meal with potatoes, butter, cheese led to 0 Lingo counts and a small blip on the glucose chart. There's also a ramp up period when you put a new one on where it is inaccurate and all over the place, which completely messes up your weekly and total averages. The readings also rarely lined up with my blood glucose monitor - and while I know they won't be exactly the same because Lingo tracks serum glucose - the huge discrepancies I was seeing are not supposed to happen. I did Lingo for 2 months and have stopped for the summer - didn't want it to look like someone put an Air Tag on me when I wore short sleeved shirts! I would likely do it again here and there despite the problems because you can still get helpful information in the net - it's just for the high price tag (almost $100 a month) and the fact it's made by a pharma company, I'd expect better accuracy and reliability.

ZERO STARS!!!! This device is definitely not worth it! I just got it and within 2 hours I already have an error message that it is not connected and that I have to wait 6hrs. After the 6hrs it still doesn’t connect and it tells me to turn off my bluetooth and then turn it back on. I do that and works for about 3hrs and then it disconnects again. This time when I turn my bluetooth off and on it still doesn’t work. Plus when it does work the accuracy is way off, like 47 points. Customer service sucks as well! Update: I figured out how to keep it from disconnecting. The app has to keep running in the background. After using it for a while I like it and have added three stars.

I’m giving two stars but only because applying the device is easy and tech support was helpful otherwise I would have only given 1 star. I wish we could give half stars. There are several reasons why I’m not happy using Lingo. Proceed to purchase with caution. Here’s why: -The app is terrible. Adding what I ate is pretty unhelpful. Why isn’t it integrated with something useful to track carb count? The challenges aren’t really fun or useful. Why have them in the app? Overall the UI is ok BUT its integration with Apple Health for iOS isn’t very good. It took several tries to get it to transfer my readings over. Also I can’t print off or send my reading history via the app. What’s the point of tracking it solely in the Lingo app? -The accuracy is lacking. When I use a glucose tester and finger prick I use the 5th drop of blood (as taught by to me by a nurse) as it provides a more accurate reading. Lingo constantly reads lower than the finger prick method. I uploaded pictures of my Lingo reading versus the finger prick method to my review. Lingo runs a lot lower and for me that’s dangerous because I have to time my meds to keep my blood sugar below 150 because I’m extremely glucose sensitive right now due to some of my meds. -Prices for two weeks range from $48-53 depending on when I put it in my Amazon cart and order. Via the Lingo website it’s about the same. For a glucose finger prick it’s about it $30/mo for supplies as I test 3-5 times a day. -The adhesion is ok but because it’s placed on my arm I am sometimes klutzy and I have caught it on clothes and on a doorway that practically ripped it off my arm. I paid for the patches that go over it separately but shouldn’t one be included in the box? Overall I don’t think it’s worth the money. It is a pain to check via finger prick several times a day but if accuracy is needed this isn’t the best option. For overnight readings it’s semi helpful. I was able to see that my glucose levels went up during certain periods of the night and correlated with periods of wakefulness. I also discovered my antacids were causing a significant rise in my blood glucose level and now have to change brands. I might try one of the other CGMs but I have one last Lingo for two weeks but then won’t be buying this again.