Stelo Glucose Biosensor & App - 2-Pack (Up to 15 Days Each). iOS & Android

If I could give it less than 1 star I would. Sensor worked for only 8 days, and then gave me a “Signal Loss” message. I went through all the trouble shooting steps in the app, and checked all my phone settings. Signal NEVER came back. App says if signal loss lasts longer than 3 hours, contact customer service. I went through the app to manufacturer’s website. Customer service is an automated chatbot called SteloBot. Eventually, I was able to request chat with a live agent in the Philippines, which is also where their technical “support” is. The agent said they would request a Case ID be assigned and open an investigation, and that I would hear back in 1-2 business days. The next day, which was Saturday, I received an e-mail with a case ID number, and a link to fill out the customer service form. There was space to provide details of what the issue was as well as the sensor serial #. Before I could submit the form on Sunday, I received another e-mail saying that if I didn’t respond within 24 hours, they would consider the case closed. I submitted the form. The Stelo/DEXCOM system, acknowledged receipt of the form, and again said I would hear back in 1-2 business days. 8 days later I still had not heard back, so I again went through the Customer Service rig-a-marole, to finally contact a live agent. They were polite and apologetic,and they requested a “reinvestigation” . I received an e-mail later that day saying, my “customer service issue could not be validated” (whatever the hell that means), and that they would not replace the faulty sensor. I contacted customer service AGAIN, and asked what “could not be validated” meant. I was told the “computer investigation” said the signal came back after 10 mins. I told the agent that was not correct. The app said “Signal Loss” and the signal NEVER came back. I checked multiple times a day for the remaining time the sensor was supposed to be working. Never came back. I asked if there was anyway they could just replace the sensor anyway, and was told that it was not possible for her to override the computer’s decision. I told her once again that the “computer investigation” was incorrect, and that there was no communication between the sensor and the app on my phone, after the initial signal loss and that the signal never came back. I was told that they could not manually issue a request to replace the sensor. For what it’s worth, there also seemed to be no mechanism to attempt to re-pair the sensor with my phone, or the app installed on my phone. While it was working, the app/sensor worked okay. Be aware, the sensor DOES NOT measure actual blood glucose. It measures the amount of glucose in your interstitial fluid in your tissues, just beneath your skin. If you’re diabetic and/or need your exact blood glucose, this is NOT the device for you. I’m almost 70. Blood glucose was not diabetic level, but was higher than my doc would have liked on my last 2 physicals. My wife is an RN, and thought these might be a good indicator of what affected my blood glucose and by how much. The accuracy is roughly + or - 10%. Just be aware of that. It’s more for blood glucose trends than actual, accurate blood glucose, so if you’re diabetic and need exact blood glucose, you probably don’t want to rely on this product. The customer service for this product is EXTREMELY WEAK in my opinion. Let’s face it, we paid Amazon roughly about $110 for a two pack of these sensors. The manufacturer probably pays around $10-15 per sensor. The fact that they refused to acknowledge a faulty sensor and wouldn’t replace it tells me all I need to know. Yup, you guys got me for $110, and saved $10-15 on replacing a sensor, so in theory, you got me, ONE TIME, for $125, but I will never again by ANY product associated with Stelo/DEXCOM, and I will discourage family and anyone else who is considering it, from purchasing one of their products. For what it’s worth ; out of curiosity, just checked other reviews of this blood glucose monitor. They actually have a higher percentage of 1 star reviews than 5 star reviews. What does THAT tell you. AVOID THIS PRODUCT !!!! WOULD NOT RECOMMEND/WOULD NOT BUY AGAIN/ABSOLUTE CRAP !

I’m in the 50+ range and my lab tests were generally normal, as of lately with slightly elevated fasting glucose. Until I developed an early cataract and my eye doctor asked me if I was diabetic. What!? I decided to get the Dexcom Stelo because the reports are more aligned with what a doctor would want to see. I put the 1st sensor where it is recommended, the back of my arm. Then I went on to have breakfast. ham and cheese omelet, ½ a bagel with cream cheese and a glass of orange juice. And then my world came crumbling down. My glucose was already high, 120 and after 40 minutes it shot up to 240!!!! I was lucky I had the chance to hop on a treadmill and I walked that off until I saw 80. About 40 minutes. From that point my world had completely changed. My insulin is not performing as it should, hence the cataract and other health issues. I then began a quest to keep that glucose stable and I have to say, now 45 days into this project I lost 10lbs (from 180 to 170) just by monitoring what I eat and walking more. I still eat pizza and chocolates, but not to the rate I used to and thanks to the CGM I now know when to stop or mitigate a spike. Is it perfect? Absolutely not. Is it accurate? Not really. But it gives you an important view of what is happening in your body, glucose related. Does it hurt? No, but sometimes it is uncomfortable. Well there is a needle in your skin and as you can see from the images a fairly big one. yeah, yeah, it is made of soft whatever, but it is a needle. So if you bump on the sensor, put pressure on it or anything that may move that needle inside you skin you will feel something. It is not pain, oh my god let me rip this out of my body, but you do feel something. PLACEMENT - VERY IMPORTANT The first one as I mentioned was on the back of my left arm. This location gave me steady almost uninterrupted readings. But I’m a side sleeper and I worried (for 14 nights) that I could be sleeping on top of the sensor. So the 2nd sensor I decided to move a bit inwards my arm. I carefully selected a region between my biceps and triceps muscles. From reading other reviews, sticking it on a muscle is a big no no, so I did not want to try that. That place I would not sleep on top of it, but I did not account for walking. And as my arm moved back and forward the sensor was being hit. And of course I went to a Disney park and walked 20,000 steps (no exaggeration here) daily. So the second sensor did bother me a bit. I felt some pain at times and it began "timing out” a lot. Still negligible for what I need but there were many, many times the sensor did not record a reading. You see gaps in the dots. The third sensor I decided to, as instructed by internet knowledge, put it on a fatty place so I chose the lower center of my belly fat, right below my belly button. And I learned two very important things. One - the first 6 hrs your readings will be high, much higher than normal. I noticed that with my 2nd sensor and confirmed it with my 3rd. The reason being is that your body is reacting to a foreign object so it is sending “healing” power to the region. Apparently glucose is part of the healing process. I don’t know the biology behind it but a quick research online and with AI, yeah it does happen. Some people even put a new sensor 12 hrs before activating it to get consistent readings. Two - reading from my belly fat is incredibly inconsistent. First I thought there is a sensor issue because after a meal it shoots up to 170 in 20 minutes, then comes crashing down, then up, then down. Like a roller coaster. Readings from the back of my arm were much more consistent. Going up to 140 at most, and slowly coming down. So again, I’m not a doctor or a bio whatever expert, but a quick research shows that this does happen. And it sort of makes sense. I have 0 fat on the back of my arm but some noticeable fat on my belly. Now I have the proof of why. For whatever reason the human body circulates more glucose on fatty areas than on lean ones. Hence why you have stored fat!!! Makes sense, no? At any rate I’m still trying to understand the whole placement and readings, but my next sensor will go back to the back of my arm for sure. The Pros Incredible Metabolic Insight: This device completely takes the guesswork out of nutrition. I learned very quickly that my body reacts to "healthy" foods (like fruit) with significant glucose spikes. It taught me that I don't necessarily have to cut foods out entirely, but rather manage my portions to keep my levels stable. The App Experience: The software is intuitive and makes the data easy to digest. Watching the real-time difference between a high-carb meal and a keto-friendly meal is a masterclass in how your specific metabolism works. The last update now uses AI to look at a picture of your food and then give you an estimated breakdown of Carbs, Fiber, Protein and fat as well as calories. You can also scan a barcode and it will tell you exactly what the food you are consuming is (if it was made in America - no international barcode yet). So for a diet perspective it is an invaluable tool to correlate a particular food combination with your glucose. Clever Application: The applicator is well-designed for those of us who are squeamish. It’s a "push-button" system that applies the sensor instantly. You don't even see the needle/filament until you take the device off days later, which is a huge plus if you have a phobia of needles. Reports: The reports are invaluable. Very detailed and almost medical grade data. They are also interactive when viewing with your browser. You can mouse over a specific reading and it shows what the reading number is. Very insightful especially for night readings. I used to have the Somogyi effect (glucose crashes at 2am then rises high to compensate and you wake up at 120), and now it's almost under control. No more night sweats, waking up thirst, yada, yada, yada. The Cons Physical Discomfort: While the application is "painless" in the moment, the wearability can be hit-or-miss. I experienced some itchiness and sensitivity in my arm throughout the week. Placement is Critical: If you don't get it in the "sweet spot," it can be uncomfortable. I felt some random pains and had trouble sleeping on that side. I even had to cut a tricep workout short because it felt like the filament was agitating the muscle or a nerve. DIY Medical Hurdles: Since this is a one-size-fits-all applicator for a medical-grade device, there is a small margin for error. If it doesn't sit perfectly under the skin, you’re going to feel it for the duration of the wear. Accuracy "Mood Swings": This is the biggest sticking point. While some sensors are spot-on, others can be 30–60 points off compared to a finger-prick test. It’s better for seeing trends (spikes and dips) than for trusting the exact number to the digit. But this also may be a placement issue. Hard to say. Support: This is a DIY thing. Do not expect anyone to help you on the phone even if you have a defective sensor. Overall Summary This biosensor is a 5-star tool for data, but a 4-star experience for comfort. If you are following a specific health protocol (like the Frank Suárez "Metabolism" principles) or trying to optimize your weight lifting and diet, the information you gain is invaluable. It transforms your body from a "black box" into a readable map, showing you exactly how much glucose your body tolerates at any given time. And by understanding your specific metabolism you can control your diet and exercise to dial your glucose to a healthy pattern hence increasing your health and lifespan. Recommendation: BUY, especially if you are serious about fitness or metabolic health. Just be very mindful of your placement during application to ensure it doesn't interfere with your sleep or workouts!

UPDATED 9/16 Okay- it pains me to do this but I’m revising my rating. The first sensor worked great, game changer. But when I changed sensors after the first one was done I’ve had nothing but issues with the 2nd one. And it’s IMPOSSIBLE to get help!! Your forced to deal with a bot and if you can get to the point where you can actually open a case, good luck because you cannot even correspond to the email you send to further explain or provide info on th issue because it’s a no reply email?! Huh?! What kind of service is this? Zero service. I reached out to Stelo via a bot (your only option unless you can manage to get to the chat during certain biz hrs), finally got to the point where I could open a case only to be told in an email response to my case that I need to fill out some form which they never sent and then they proceeded to close my case the next day! I could not even respond to let them no that no form was ever rcvd (and yes, I check my spam/junk) …And yet I’m still stuck with a faulty sensor. I cannot even respond to the case email! It gets kicked back - so while I think the CGM as a device is amazing for understanding where your blood glucose is without pricking your finger all day (and seems more accurate too!) I cannot support a business who makes it so difficult to get help when it’s needed. I’m switching to a different company for my CGMs going forward. Sigh. I really liked the convenience of getting this CGM via Amz but it’s not worth this hassle when something goes wrong. Original! I’m working on a healthier lifestyle to better manage my blood sugar and was getting frustrated with the glucose meters being questionable when I did finger pricks. Between three different ones my b2b readings using the same finger prick would have variants of 10mg or more making it nearly impossible to determine which one was the most accurate. Decided to try this CGM and wow! Not only has it enabled me to find the blood glucose meter that is the most accurate it also helped me better understand my glucose levels after meals, exercise, during sleep patterns and has helped me stick to a lower carb lifestyle! I love seeing that I’m finally within a normal range day over day after making significant lifestyle changes!! I’m finally able to get into ketosis each day since it’s become such a great motivator to stick with that way of eating. I’m about half way through using my first of the two sensors. It paired with the app on the first try and through workouts, showers, and sleeping on my side, it’s still well intact. I purchased an additional pack of waterproof over patches that are a bit larger than the ones that come with it and I believe they have made a huge difference in protecting the sensor and keeping it in place. I’m definitely going to keep using these for the foreseeable future, at least until my next round of bloodwork in the next few months!! Im grateful to find and use this CGM w/out the added expense of a prescription. Making these more accessible is a game changer!

I bought this to monitor myself for diabetes, as I am at risk. The monitor is as comfortable as it can be. I believe it has improved my overall health and improved my nutrition. It’s not a live glucose monitor INSERTION is relatively painless, especially compared to finger pricking! You feel the spring action of the device quickly putting the monitor on your arm. The 10-second manual pressure after insertion, as instructed by the manual, is more uncomfortable than the insertion itself. If you’re clumsy and bump it due to bad placement or absent mindedness — it will be painful but not terribly, less than stubbing your toe. If you put lots of pressure on it while sleeping (which is mentioned in the manual) it will be similarly uncomfortable, as mentioned in the manual pressure step. ADHESIVE patch that comes with each device is sticky and leaves residue (easily removable). I find that the adhesion of the device’s surrounding tape is enough. You must place properly, thoroughly clean the site beforehand with alcohol, and leave dry for at least 24hrs for adhesive to really really work. Device typically looks ready to be removed by days 12-14. You will see it is a thin wire that is inserted under the skin — not a needle as someone previously stated. REMOVAL of device is easy; like taking off a bandaid. LIFESPAN is typically 12-14 days. I usually remove by day 12 or 13 if I’ve been in the pool or had a particularly sweaty week. The APP is intuitive, especially if linking with Oura ring/app. The device updates to the app every 15 mins, with 5 min increments being monitored but only reported when synced during the update. Again, it is not a live glucose monitor. The AI used to help report nutritional information when logging a meal, can be unreliable and needs your review. Should be approached more thematically, I think. By using this device I have learned what types of foods/meals lead to spikes in my blood sugar and am able to plan accordingly. I will be buying more and more.

Update 05/2026: Cancelled subscription when latest sensor died after<3 full days, continuing pattern of very early failures. Readings were far from two other finger stick testers. This one lasted <20% of the advertised monitoring period, too expensive for useable duration and readings not close to finger stick. Update 04/2026: Another sensor session ended early after multiple 2-3 hour dropouts during 10 day session before total failure 5 days early. App's recommendations how to avoid failure did not apply to me (kept sensor dry, applied back of upper arm where least likely to pressure while sleeping after market overpatch held securely - it was not falling off). My sensor read 75+ points too high most of this session compared to finger stick readings and this latest sensor was unuaually painful the entire 10 days 6 hours it lasted. Manufacture date about 4 months before use, it should have had many months shelf life before expiration date. Found aftermarket sensor overpatch which lasted longer than original (B0C1DK4N4M) which I recommend, but I continue to have dropouts and 2/3 of the 14 sensors have either died early or had significantly different readings compared to finger stick tests by 30-80 points. My Previous Reviews: My first 4 sensors worked as expected for 15 days each. 5th sensor would not pair until I removed and reinstalled app (app crashed on launch preventing data export/recording for doctor) erasing hisyorical data needed for my doctor and then it only lasted a week. It also read 40-60 points high first 3 days then read at 50% of actual (compared to two different finger stick testers) for the remaining 3 days wifh multiple 1-2 hour disconnects on 6th day. 6th sensor also lasted 6 days with 3 days very high readings compared to finger stick then 3 days erratic but extremely low (often below 70) readings when finger stick showed 110. Not worth $99 for two 6 day sessions with totally unreliable readings, much more painful than previous 4 sensors and data loss from app corruption. Perhaps bad batch or heat damage to sensors during shipping... (package arrived during 110 deg weather???) going to use old style finger stick measurements for a while before spending $100 for sendors that only work a few days and provide erratic unreliable readings - first 4 worked OK but now not sure what to think other than last $100 wad total waste of my limited savings. Update 11/2025: Latest two sensors (one on me other a friend) both failed on 9th day and had several 1-2 hour disconnects in last 2 days of operation (at nearly identical hours since activation). Mine was with android app, friend had iPhone. both read about 30 points high for first 36 hours. Hopefully with cooler weather for shipping conxitions the next batch will work for advertised period or I will cancel subscription as I'm not getting even 60% of the measurement duration that I purchased with >50% of units purchased.

I have been using the Stelo CGM for about 7 months and am just about to purchase the 7th box of 2. I have found it invaluable in figuring out management of blood glucose. The life-time of each sensor is a little uneven, but I have now used 15th sensor. Most have given the full 15 days and with many I have used most of the 12 hr grace period. On one the overpatch came loose about half-way through the 15 days and eventually that sensor failed. Since then I've treated my arm with Flonase and made sure that I can keep the sensor dry for at least 8 hours and have not had this problem. I had several sensors fail late in the 15 days and just replaced them. One failed for no apparent reason early in the 15 days (maybe day 6) and I appealed for a replacement but was denied. I got a prompt notification that my complaint was being reviewed but never heard another word. And herein lies the reason for 3 stars and not 5 stars. But it only took me an hour to figure out how to chat with the bot and how to file a complaint. I was a little irked but not sufficiently disappointed to bother with a review. But this past week I had another occasion to interact with Stelo customer service. It started the day after I started a new monitor. Once it was working and I was getting data, I discarded the applicsator with it's QR code and did not write down the code numbers. Unfortunately the next day I suffereed a cell phone disaster and not all of my data and apps could be recovered. That included my Stelo app. I uploaded the app again and recovered the data from the previous monitors but the new app couldn't pair with the current sensor although the sensor was still in place and presumably still recording data. This should be an easy fix. It must be possible to track a monitor. I probably spent 3-4 hours trying to get past the bot which repeatedly suggested that I could just use the code. I finally talked to a real person, a very nice customer representative who suggeste that I shouldn't have discarded the applicator with the code and should have kept the number. However she finally suggested a number I might try. The monitor briefly came to life before giving a sensor failure message. The customer service representatives told me there was no recovery once the failure message came up. She did provide the forms to file a claim which was denied the next day. This time I was notified. Customer service is worse than non-existent. If the website just said "all users are on their own", users would know where they stand. I probably would not be any more disappointed than i am now and would not have spent the better part of 4 hours on the Stelo website. Free Hint. Keep the applicator until you discard the sensor and write the code down--I use Notes on my cell phone for this.

Update 5/26/26: I gave Stelo another try and I believe there is detail left out on how to apply with a better success rate. Before you press the button, you have to push the device down all the way onto your arm hard enough to not see the clear incasing of the needle (see picture). I left a star off because the adhesive stickers do not last the duration of the device. They should include a sticker for every 5 days. Within 10 days, I have to take the sticker off because at this point it is lifting. Old review March 2026: Both sensors did not work. One sensor never connected no matter what I try to do. I restarted my phone. I uninstall the app and reinstall the app. Nothing would help sync the sensor. So I peeled it off and I tried to set up the second sensor that comes in the box this sensor connected, and I felt hopeful. My first reading was 85 and then it showed that it was drastically dropping. After about 15 minutes, the sensor was coming with a reading of less than 70. Even after I had a piece of candy the number would not go up. I decided to get some sleep and after resting for 3 hours, I woke up and saw that the sensor had stopped reading and disconnected, saying that the cycle was done. I am very disappointed with how expensive this product is and it doesn’t seem to work. The only thing good about this device is that applying it was fairly easy and pain-free. I have put in a claim and complaints with the manufacturer and requested a resubmission for the item that I bought. Unless I can get some working sensors, I cannot in good faith suggest this product.

First sensor fell off. And second sensor is giving me false readings. Saying my blood sugar is low despite that I've ate. Apparently they don't do refunds if ur dissatisfied with product. Claim was put in for replacement sensors but haven't heard back yet (less than 24 hrs). They don't have a 800 number to call. They refer u to chat bot for customer service and it is generated by AI. No real way to contact anybody. It is a shame because I probably never use a bio sensor again because it is too hard to use. So essentially I'm out of the money for the sensors plus the special wipes I bought seperate to make sure the sensor sticks. Shame it is made by a reputable name in diabetic supplies. What kind of company won't refund u back for foolishness. Shame I didn't read reviews first. Update: I finally got a hold of them. They are replacing both sensors. I already got one. I put it on and it worked. However because I work in a hot, humid environment, after 24 hours it came off. Not their fault. But if I known sweat is a factor I wouldn't have bought it. I am still waiting on the other sensor. However in 24 hours I got some valuable information about my glucose health. Which may allow me to pursue different avenues for diabetes management. If u can get it to work it is great. But if u don't have patience for adhesion issues and sensor failure don't buy it. Adjusted my review from 1 star to 3 star. I may pursue more replacements but definitely not purchasing again. Update 2: looks like I'm not getting the other sensor. When I tried to speak to customer service they kept saying are u still there while I was typing. I answered but the person failed to acknowledge i was there. However it still said we were connected. So I reached out to amazon and told them it was defective and about all the issues I had with the company. And they gave me a refund and told me to throw it in the trash. Finally I don't have to worry about it anymore. Not saying they will choose to refund everyone. But if u had a similar story try doing that. It probably helped I been an amazon prime member for a long time and I buy things regularly from amazon. Just saying. Adjusting back to one star because the company is crap and selling a sub par product.

Check if compatible. I have a fairly modern One Plus phone so thought it would work but even with buying a VPN so could access as if USA not UK it did not work.