Continuous Glucose Monitor (CGM). Made by Abbott. Optimize Your Nutrition with Real-time Glucose Data & Insights. 1 Lingo biosensor lasts up to 14 Days*. Works with iOS and Android. US Only.

I’m an RN and bought this because I am super interested in all of the metabolic disease that is overrunning our country and feel that the current standard lab testing does a poor job in identifying problems early when there is still time to modify behaviors and outcomes. As I was looking at CGMs, I was surprised to see so many bad reviews. I’ve never written an Amazon review in my life but felt my experience was so different from the bad reviews that I needed to help people feel informed. The reviews noted issues with the CGM 1) Falling off easily 2) Not being accurate 3) Not working. I purchased the Abbott Lingo and was very, very impressed with the applicator, the biosensor, and the app. Everything worked flawlessly for the full two weeks when it appropriately ended its time. Regarding the issues others noted above: 1) I proactively purchased the Ceeport CGM sensor stickers and cut a small hole in the center since the dot on the biosensor can’t be covered. Abbott should probably consider including a sensor sticker with their package, but until then, it’s a no brainer to buy a $1 sticker to protect a $45 biosensor. The sticker lasted the full 2 weeks and I had zero issues with the sensor or sticker coming loose with daily exercise and showers. 2) Reviewers had complained that they did a finger prick glucose test and it was completely different than the reading on their CGM. I didn’t test my blood sugar at all during the two weeks, however I do know that the CGM is not testing *blood* sugar, it’s testing *interstitial fluid* (in the tissues) fluid, so it’s going to vary and it is a delayed result. My satisfaction with the rest of the product and seeing appropriate fluctuations based on meals/exercise/stress level give me confidence that this is likely pretty accurate. 3) When you initially open the app any time you want to see your reading, it says “sensor not in range” (or something) and the first time I saw this, I thought it wasn’t working. It does this every time you open the app, lasts 30 seconds or so, and then it pairs and all the info since the last time you logged in is uploaded on the app. It functioned perfectly for me for the two full weeks. Lastly I’d like to comment on the application of the biosensor. I was SO nervous about sticking myself with the needle. It literally did not hurt. The spring action made so much clicking sound when it fired as I was *very slowly, nervously* putting pressure on it, that it caught me off guard and all of a sudden it was applied and I didn’t even feel the poke! I was amazed. Nice work Abbott. The other positive component of wearing this CGM was the awareness of my body’s response to different foods. It gave me incredible insight (and therefore power) into how my diet was affecting me at the cellular level, and gave me great motivation to improve my dietary choices. I felt like the phone app was easy to navigate and very well done. Excellent product!

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 review is on the Lingo Continuous Glucose Monitor (CGM) made by Abbott. I love it!! Let me repeat so you understand...I love it!! I researched the top CGM units. The Dexcom Stelo and the Abbott Lingo are the top 2. The later model is a little cheaper online. However, the Dexcom Stelo is a tiny bit more accurate. These meters are testing *interstitial fluid* (in the tissues), so it’s going to vary and and not be as accurate as if you did a finger prick (using your blood). I tested my Lingo against a finger prick and there was a 10 point difference from my finger prick. The Lingo was lower than the actual finger prick. That being said, I knew to add 10 points to my readings. I'm prediabetic and have been having hypoglycemia. I couldn't figure out why and what was causing it. And after using the Lingo I found that my assumptions were dead wrong. The Lingo allowed me to tract my meals, exercise and stress levels. The information I entered into the Lingo app gave me real time readings. Matter of fact, you get real time readings 24/7. At any given time during the day I could look at the app and it would tell me what my glucose reading was. If it was too low, I knew it was time to eat something to bring my glucose level back up to my normal range. My satisfaction with the rest of the product and seeing appropriate fluctuations based on meals/exercise/stress level give me confidence that this is likely pretty accurate. One monitor lasts approximately 2 weeks. I've been wearing mine approximately 12 days and I'm very happy with this products performance. I don't like needles and I just knew the applicator would pinch or hurt me when applying the monitor. But I never felt anything when I applied the monitor. I was totally surprised and had to check to make sure I'd applied the monitor. It's very easy to use. The little round monitor is about the size of a quarter and fits snugly on your arm. I see reviews stating theirs fell off. I don't know why there's didn't stay on but there are patches you can purchase to place over the Lingo to make the monitor stays on if need be. The Lingo and Stelo CGMs are not medical grade glucose monitors. If you want a medical grade CGM your doctor will have to prescribe one for you. Medical grade CGMs will alert you when having hypoglycemia or hyperglycemia episodes. However, most insurance will not cover the cost unless you are a diabetic and on insulin. Therefore, there's the alternative monitors (Lingo and Stelo) for people like me. Amazon offers excellent pricing with delivery, as well as Ebay. Do your research to see which monitor works best for you. Check out Reddit.com for continuous glucose monitors. For instance the Dexcom Stelo allows you to take a picture of your food and upload what your eating. Pretty Cool! But readings only update every 15 minutes vs. instantly on Lingo. Decide which monitor you think would work best for you and then jump in. The Lingo will also help you make better food choices. I've actually lost 3 lbs in the time I've been monitoring my glucose. I encourage you to read the review posted by "Louise". It's very informative and goes into much more detail on the Lingo monitor. That particular review was the reason I went with the Lingo after doing allot of research. Also, Dexcom has a program where you can get a Dexcom G7 (medical grade) monitor to try for 14 days at no cost to you. But you will need a doctor's prescription for the medical grade version faxed to Dexcom. I believe Abbott has the same type of trial. I'm extremely happy with my Lingo and plan on using it for a couple more months. It's that good and my health is very important to me.

really not impressed: the first sensor out of the box of two is not connecting to my phone. I have been using continuous glucose monitors for two years now, and this is the worst experience yet. I know how to insert the devices, I know how to use glucose monitoring apps, I know how to troubleshoot things with my phone. This is either extraordinarily poor quality control or just a really lousy design. Being unable to test it by, trying an alternative means of connection (e.g., scanning a QR code or entering a serial number from the box manually) is very frustrating. I did try with the naked phone--but the case I use is thin/light, certainly does not impair pairing with other CGMs. Update: it's 2 for two, the box of two are both failures. Not impressed. Will allow them to replace once in case the box was mishandled in transit but after that it is Goodbye. My phone connects to other Bluetooth devices perfectly well, and has connected to other CGM's without difficulty. There is nothing like useful support on the website to help.... even the app is now locked on being unable to connect and offers no option to get to another screen or a troubleshooting section or to enter a trouble ticket. Telephone support took 25 minutes to get back to me after the first sensor failure; 24 hours later, it's the weekend and nothing after 2 1/2 hours plus it hung up on me after a few minutes when I tried to just stay on hold in case that worked faster. SUPPORT FAIL. Very poor design, no ease of use, poor support access. I was hoping for better accuracy but right now reading accuracy is zero because there are no readings. How do people with even worse mobility use something like this that requires some kind of magic touch? Update: only one of the promised 2 replacement sensors has arrived, and I have the same failure to connect on scanning for the device (phone is working fine with other bluetooth devices including a different CGM currently). Repeated downloading of the app and use of alternative app has not worked. I was promised contact with technical support who could troubleshoot potential settings with me--no message received after nearly a week. And today, when I called them to request technical support again, there is a new message on the support line--not relevant to me--that repeats on endless loop, not even an option for 'press 1 to be called back later according to your place in line'. This is corporate sludge at it's worst. Update 1/18/2026: Updated app (v 1.9.2) did not help. Today Lingo support is aware of problem with App and Sensors. iOS 26.2 12mini

I purchased one biosensor from Amazon as an experiment and subsequently purchased a 12-week subscription directly from Lingo. The third biosensor I applied indicated very low glucose levels. Not knowing if I had a medical issue or a technical problem, I contacted customer service. They sent a free replacement biosensor, and the data was in range again, so it was probably a sensor issue. Of the last four sensors I received in the 12-week subscription, only one worked properly. Two of them were inoperable within hours of application. Even though instructions were followed, two of the sensors had connection issues and, when removed, showed loose or bent needles. The final sensor showed very low readings AGAIN and the app said to wait eight hours for data to display. After eight hours, the Lingo app automatically ended the sensor and provided a prompt to contact customer service for a replacement. While the sensors could be replaced gratis, shipping takes a long time. Due to significant frustrations with quality, I researched other options instead of requesting replacement sensors. For a similar price point, Stelo by Dexcom provides biosensors AND water resistant cover patches AND the ability to download data to a CSV file (via Dexcom Clarity) AND the option to forward data to a doctor AND the capability to display data on Apple Watch. After placing an order for a 12-week Stelo plan mid morning on July 28, 2025, all six sensors showed up on my doorstep the morning of July 30, 2025. Note: Lingo ships only two sensors at a time on an extended subscription. The Amazon rating of two stars reflects the small amount of value from the product—mainly learning how these biosensors work, the data they can provide to support well-being decisions, and what I perceive as unfavorable or favorable features to optimize return on investment.

Lingo is easy to put on and and connect to your phone upfront. But it constantly disconnects, which then requires you to turn your Bluetooth on and off and then reconnect it in order for you to see your account out of 10 of them to have been completely dysfunctional, but they do give you your money back pretty easy and or send a replacement the readings though are pretty poor the CGM and a traditional finger poke monitor are different classes obviously but I didn’t realize how far apart the readings would be my Lingo will say that my sugar is below 55 where my finger poke will say I’m at 90 almost every morning. It is off by 15 to 25 points. One thing I do find helpful. That whether the readings are right or wrong, it does help me to see which foods negatively impact my blood sugar more than others. So if you’re just wanting to see what’s happening in your body, it can be helpful but if you are a diabetic, I need accurate reads then I would think twice about using Lingo alone.

I purchased the Lingo to confirm my glucose levels were normal. Attaching to back of the arm was simple and easy. The app was simple to install and use although it did disconnect one night even though my phone was on nightstand next to me. It reconnected in the morning and filled in the missing overnight gap in the graph. I monitored for 14 days and then it stopped right on cue. It was still stuck on the back of my arm pretty tightly. Strenuous workouts and showers had no effect. I downloaded the data to google sheets and organized into graphs. I found that the gap I had one night was missing, also as another reviewer reported the logged events and meals were not included making the data download nearly useless. I ended up making about 50 screen captures of all the Lingo pages from my phone and merged them into a single image with continuous 14 day graph which I then printed as a PDF. It only took an hour or two. If the app provided a full useful data download I would have given it five stars.

A friend of mine was visiting me when she started to check her “glucose reading” on her cellphone. I thought she meant a finger stick result, but she corrected me saying it was a continuous monitoring device. I was impressed by the thing. (I love gadgets!) My own labs had pointed to “borderline diabetic,” which was anxiety producing. Having been an RN in a large hospital, I had seen the results of full-on diabetes, from losing fingers to losing kidneys and developing transplant complications. Not going there! I checked the internet to see what they had to say. It seemed rational, well tested and produced by a reliable company. I decided to try it. It seemed a little expensive as a “One off” trial, but I decided to see for myself. I was—and continue to be—impressed. What struck me most favorably is that it’s a “training device” as well as a simple minute by minute monitor (which it is of course.) It provides the user with information about his/her eating habits and offers “challenges” that can help the user see what they can accomplish on their own. It also has small discussions regarding eating styles and recommendations about healthy activities. It also provides “challenges” that help you focus on things you might have thought unimportant, but which really aren’t, like fluid consumption. Probably the most important aspect of the device is the opportunity to log information about one’s activity, because it engages the user in the whole process. That confronts one with the reality of behavior and outcomes. (It’s also addicting. There’s nothing like making oneself the center stage character in one’s own drama!) There are note sites for “food and drink,” “exercise,” and “other.” These are placed along a timeline under the graph, so one can see what was going on when the graph went up or down. By doing some of the “challenges” one learns how much one’s own decisions make an actual difference. Food and drink, and exercise are obvious. I use the “other” for charting things like my blood pressure, pulse, sleep, mood, willingness to be active, fogginess (I’m almost 80 and am forgetful at times), and other things relative to my overall health. In following these through time, I came to finally realize what modified these aspects of my life by diet choices alone! As a former RN I “knew” that but didn’t practice it; I just advised it. (That was “for other people,” of course; I was Wonder Woman—the suit has long since been sent to Good Will!) The normal parameters on the graph showed me that my glucose was peaking above 140 even to greater than 200 at times, then crashing shortly thereafter to below 70. Needless to say, I was foggy, tired even after sleeping to the point that my cats were trying to determine if I’d died and there’d be no breakfast today. I’m more energetic, have started doing crafts I’d not done in ages, read more, my thinking is clearer, I no longer wonder why I decided to cross the room in the few seconds it took to get there, etc. I ask you, what’s to lose for a few dollars?