Lingo Continuous Glucose Monitor (CGM) & App. Made by Abbott. Know the impact of what you eat. 1 Lingo biosensor lasts up to 14 Days*. Works with iOS and Android. US Only.

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.

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

The lingo is great little piece of technology. It has a small profile and it works well. Here I address the major points: 1. Accuracy: I'm on my second lingo, and I compare its reading with TWO separate True Metrix glucose meters. Every time I have checked, the lingo reading is between the two reading from the True Metrix meters. So the lingo is never far off from what is the true value. The sensor does read low if you compress it, like when you sleep on it. But that is a minor issue. 2. Ease of application. The applicator is spring loaded and the unit goes on without a hitch. Don't be worried about what looks like a needle -- I feel nothing from the puncture when it inserts. I inspected the unit after removing it, and the probe looks like a flexible short piece of hair, so very thin and unobtrusive. 3. Sticking power: I bumped my first unit several times and it stayed on just fine. I prepared the area by shaving my hairy arm and cleaning it with isopropal alcohol. That seemed good enough. It finally came off prematurely after I got really sweaty and pulled of my shirt, which was sticking to my arm. I didn't feel it coming off an found that it had re-stuck to my skin a couple inches from where it had been. So I just washed my arm and applied a new lingo sensor. I purchased the little sticky pads that one can place over the sensor to protect it from accidental bumps, and that seems to work well, making it less likely to be pulled off. 4. The app: It works well and provides a running plot of the glucose data in 5 minute intervals, taking a running average over the data that is taken every minute. 5. Customer support: Support is great. They respond quickly and take care of the issue. My wife had a defective sensor and it was replaced right away. 6. Data: You can contact customer support to request your data, which they provide by email in CSV format. Two suggestions here: (1) It would be nice to be able to download the data electronically without the need to request it by email. (2) I would like to have the minute by minute data so that I can analyze the statistics. They tell me that they are working on electronic access but I have not heard back about getting the minute-by-minute data. Overall, this is a great little device that helps you see which foods and activities affect your blood glucose. And, it's nice having long term data to compare it with your A1c. In my case, it appears that the A1c results are much higher than reality.

Heads up…Long review, I’m not a fan and can’t recommend it. I purchased 4 of these thinking I would get a good idea of what my diet and exercise was doing to my blood sugar for 2 solid months. First one worked okay. I did test it against a finger-stick monitor (Registered Dietitian here,) and found that it reads low. The monitor I used is made by Freestyle, same company (Abbott) that makes Lingo. My finger-sticks were about 5-15mg/dl higher than the readings coming from the biosensor. I tested it several times during the two weeks, most were 15mg/dl higher. I knew at that point that it wasn’t super accurate, but I could still see that even a tiny bit of sugary creamer in my coffee sent my blood sugar up and then crashing after a few hours if I didn’t eat anything else with it. That info helped me to give up the coffee creamer since I always tend to crash after sugar. I tested different sweet stuff, mixed with and without fats and protein. I was excited to continue with the next sensor and was planning to just stick consistently with my healthy low carb diet and not test sweets since I know I crash every time. I wore the first one without issue, knowing that it wasn’t super accurate I just looked for trends. It was fairly easy to take off after two weeks of wear, but I was surprised how sticky it still was. Hardly felt it on me or when I applied it or removed it. I could not sleep on my left arm or I would get odd swings in readings at night. After removal I waited two days and installed the 2nd. The second gave me a kinda high reading for me after an hour even though I hadn’t eaten anything yet, I think it was around 89mg/dl. Then I got the dreaded error: “Please wait 8 hours to see your reading or contact support.” No readings or history were showing. EIGHT hours? That seemed crazy. I did wait about 3, but nothing changed, so I emailed Abbott. I did get a response fairly quickly, maybe 12-18 hours. I’m sure a call would be quicker. I had to answer a billion questions and finally got an email back that a replacement was on its way. So I was told I could remove the sensor that I had on and trash it. Sensor 2 removal was tough. Since it was freshly placed, it was super sticky. After I finally got it off I was bleeding quite a bit, took a while to stop and yeah, that was fun. That one left a scary purple bruise. Since I still had 2 more sensors on hand I decided to place another on my right arm today (3 days later,) since my left arm is still bruised. I was a bit scared after the drama removal of the last one. Again, no pain applying. Whew. I was sure this would work. After one hour, (it takes an hour to calibrate,) this time it said my blood sugar was below 55. (Which BTW, I got that a lot when I wore the first sensor. When it’s below 55mg/dl, you don’t get a number, just <55.) then about another hour later I got the same error message again asking me to leave it on for 8 hours or contact customer service. Ugh. I did email Abbott a few hours ago and requested a refund for 3 sensors this time, no answer yet. I wore this one about 4 hours. Nothing. I just removed this second “error” biosensor and it was tough to remove like the last. New and very sticky, which is excellent if it’s going to stay on for 2 weeks, not 2 hours. Thankfully, I didn’t bleed much and no bruise so far. The app is pretty limited. Really needs improving. I did read that the Lingo goal is very confusing for a lot of people and I can see why it would be. It’s not intuitive. I got the hang of the app and was happy that it connects to Apple health and automatically adds my exercise. Easy enough to add food, but doesn’t connect to the Cronometer food tracking app that I use and love. I wish that the readings below 55 would be displayed since I tend to be hypoglycemic (low blood sugar) and it would be helpful to see what the lows were. I will say that I can typically feel my lows and my <55 readings did not feel like I was having a low. Wish I had confirmed a few of those with a finger stick. Great idea for self-help people like me. Needs lots of improvement. If you’re prediabetic or know an endocrinologist, or even talk to your family doctor about why you want to try one, especially if you’re worried about your health or have a family history of diabetes. I would ask for a prescription version of a CGM. Your doctor might give you one to try, but those need to be placed and removed by a health care professional. Your doctor will be more willing to give you a finger stick monitor if you’re willing to stick your finger first thing in the morning for a fasting reading, after meals and exercise. Monitor is cheap, test strips are pricy OTC. You can also get a prescription for test strips if your doctor sees a need. Seems scary, but it’s not too bad and it’s definitely more accurate if you're really worried about your health.

I just finished my first sensor. It went the full 14 days and quit right on time. Worked seamlessly with my iphone. I was impressed with how I could watch the effect on my blood within about 15 minutes of eating or exercising and over the two weeks using it, I gained quite a lot of insight into how my body responds to the foods I normally eat. I ate my normal amounts and selections for the most part to see my responses. But, I'll admit, by the second week, I slightly biased my amount of exercise (more) and food choices (smaller portions and avoiding what had shown as big spikers). My fasting lab runs about 117 and this sensor ran about 93 for a comperable reading....quite a bit of difference, but I'm hoping it was consistently about 25 low so I could judge how hight the other readings were. Who knows, without a way of calibrating the Lingo. My biggest negative was the Lingo software. It is buggy (doesn't always respond to touch screen) and it , IMO, is poorly designed to give the user much analytical info to help improve their habits. You can download your raw numbers, but only the time of day and the glucose reading....not anything about the corresponding events you enter such as what you ate or how much you exercised! I couldn't believe they don't download this data, for without it, the glucose readings are pretty useless other than just nice to know. I couldn't believe Abbott Labs includes such subpar software with such really impressive technology! Hopefully, they will up their game on the next update!

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.

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.

Despite some of the negative reviews on here I decided to give this a shot. A good friend of mine had recently used it and raved about it. I must say, I’m so glad I did. This thing is amazing and pretty precise in its monitoring. The app is easy to use and the device is painless when it goes on the arm. Don’t let the needle alarm you, it’s soft like an eyelash so you don’t feel it when placed on the arm. It stayed put through showers and workouts. So much better than pricking your finger daily. This should be a staple for those who have to test/monitor their glucose. I ordered it just to see how my body responded to certain foods and how quickly glucose was processed. I learned a lot and this monitor assured me that my body was handling glucose just fine. If you are wondering if you might be pre diabetic or just curious on your glucose levels after eating certain foods, get this device. I’ve learned what spikes my glucose, how long it takes for the spike to occur and how long it lasts before dropping. Big tip for everyone out there on what we should all be doing about 20-30 minutes after eating, walk! The rest and digest that we learned in school is bogus. And if you eat sweets, even more reason to be active 30 mins after eating sweets. You don’t want all that glucose circulating in your blood. Give it a reason to be burned up and not stored, by moving! And if you have to eat junk, be sure you are doing something active after eating it. Great device and I would recommend it to anyone looking to monitor their glucose.