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

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.

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 am presently using my fourth sensor and I have been very happy with the product overall. The sensor samples every 5 minutes, but only updates once every 15 minutes. Being able to see glucose response in something close to real time is a real game changer in diabetes mangement for me. I did have an issue with my second sensor failing early, but that problem was handled quickly and the customer service was excellent, so my ratings stand at 5 stars. The Stelo app provides a lot of data and allows a lot of information about meals, activity, sleep and factors such as stress to be entered to help correlate to glucose response. It uses AI and you can enter photos of food for analyzing nutritional information about the food, ask questions about meal choices, or talk to the AI coach. The app also provides insights into glucose responses such as advice on food pairings, etc. As for accuracy of samples my meter reads pretty close to what the Stelo shows. In early use I tested with finger sticks pretty often until I was comfortable with the correlation. The data that is displayed on screen is fairly easy to read and understand. Stelo also provides a link so that you can allow data sharing with your healthcare professional.

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!

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.

This is not something I would normally order. I don't like the idea of wearing something that screams I have diabetes. It is the vanity in me. However, my numbers were very off on my last doctor visit. So, I wanted to try something different. I was looking for something that did not require a prescription. There are not very many devices on the market. Of the two that Amazon offers, one (Lingo at a cheaper price point) can only be used with an iPhone. I have an Android. The delivery time takes a little longer than I wanted (5 days), but I purchased it anyway. It came with two 15 day sensors. The first sensor was very easy to put on and sync to my phone. The second sensor, however, experienced a problem 30 minutes after I put it on and eventually expired. So for the price point of $99, I am not very satisfied since this was supposed to be a 30 day supply. Some people have commented on the difference between CGM and BGM. I took the time to read up on this, and it is normal. One of the main reasons the two may differ is BGM measures glucose in blood, while CGM glucose in interstitial fluid (a fluid just below the surface of the skin). I also found out that this device is part of the Dexcom family, which is the maker of Dexcom G7 which requires a prescription. It can be paired with the Dexcom Clarity App for a little more detailed reports. There is a 20% chance that the device might not last the full 15 day time period, which again is disappointing for the price point. Customer service was quick to reply to my request for support, and they are sending a replacement. The ability to see how food have affected my sugar levels, to see where my numbers might be when I feel a certain way, without pricking my finger is great. Even though the detection range is 70 - 250, it gives a general idea that I use to determine if I need to prick my finger for a more accurate number. With this monitor you will need to use both, but not the BGM as much. I would still purchase again, because you can you FSA or HSA. I would prefer for the 20% fail rate not to be a thing, and if it weren't for that and the price I would give it a higher rating. I would recommend if you understand what you are getting.

**Update: 8/13-Sensor worked for 15 days, no issues other than me walking away from phone and disconnecting Bluetooth a few times, easy fix, connected again after turning Bluetooth off and back on, about a minute to continue tracking. Second sensor just applied, paired perfectly, no issues. With the "Skin Grip" cover patch applied, kept my sensor working 15 days without patch coming off even with sweating from exercise and in 100 degree Texas heat. Numbers can be high but I find it close and good for watching numbers over night, morning. History: I'm going on 50, not diabetic--could be Pre-diabetic (isn't everyone Pre-diabetic?), I have PCOS (mild) so I know I have insulin resistance and it still exists and that is why I'm tracking my numbers. Started Keto 4 years ago, dropped 60 lbs. I'm Perimenopausal and on HRT for those issues, so I have gained 10-15 lbs back last year due to this. We started exercising everyday--walking 3 miles, rowing machine so far. I started my sensor on 7/29 midday/evening. As of 8/1 my Stelo has been working like it should. I did some research about Stelo, proper placement, best patches/covers for it, what to download, how it works etc. My husband is type 2 on insulin and uses G7 CGM. So, I'm familiar with it and I can compare Stelo with G7 version. My equipment and Apps: I use an Android Samsung S24 smartphone, Samsung Galaxy Watch 7 and Samsung Health app with Google Health Connect app to get information from various apps for tracking. So, download the Stelo app, download the Dexcom Clarity app and use the same log-on information as Stelo. Clarity will save your tracking information and you will be able to manage Data sharing with your doctor/clinic. If you are a Samsung/Android user the Stelo app will show when you exercise and sleep under your glucose tracking. Comes in handy for knowing what you were doing during a spike or dip. You can also track what you ate at a moment when you have a spike also. Far as recommendations---- Skin Grip covers (for Dexcom G7 & Stelo) and I got the one that totally covers the sensor. DONOT use the cover that comes with your sensor kit. You can also buy the Skin Grip tacky wipes if you have had problems with the covers coming off early. Clean with an alcohol wipe well before applying these. Apply the sensor to the fat on the back of your arm closer to your armpit but not where the end of the cover will be in your folds of the arm, if you apply too far on side of arm in the muscle area you can bleed and bend the probe in the sensor. The reviews I've seen on here state that the sensor is either too high or too low on numbers. Well, the sensor probe is inserted in your Interstitial fluid below your skin, not in your blood. The readings will be slow to respond versus your actual blood glucose level. It updates every 15 minutes versus G7 updates every 5 minutes. I have tested with a finger prick test and the readings are behind but really close to accurate for me at times. I will update this review if I see any changes or if the sensor ends early. The fine print on the website states "up to 15 days" so it could fail early. The key is to apply the Skin Grip which keeps the sensor from popping in and out while you're moving around, showering and sleeping or if you're clumsy like me and sometimes bump into door frames and such---it won't pop off! I only gave 4 stars for now because I have found issues within the app that could be better experience for the user. Another thing I noticed in reviews is the errors with the sensor from lost of connection. You HAVE to keep your phone within 20 ft at all times. Sometimes I forgot my phone, walked off and got this error. A easy fix is turning Bluetooth on/off and it connected again (30 seconds?). It is easy to use and apply (my husband did the honors of putting the sensor on for me to get the best placement). The size is small and looks just like the G7. In comparison to the G7, Stelo updates slower but it works pretty much close to the G7. Buy the Skin Grip covers and I think this will allow the sensor to work as described because I think the sensor probe works it's way out with movement IF you use just the surrounding covers it comes with. I would suggest G7 users also buy these patches. You cannot use the Dexcom Follow app to track someone else's sensor like I can track my husband's G7. You cannot get glucose readings on your watch (Apple watches you can) but there are 3rd party apps that you can use to do this but you can't use Stelo App & Clarity with the 3rd party apps. The quality is the same as Dexcom G7, just works a little d slower but you don't need a doctor's RX and insurance for purchasing the Stelo! It's great for overall patterns in glucose but if you're diabetic or on insulin--talk to your doctor about getting the G7 to track.

When ordering these I saw reviews about issues contacting customer service as well as problems with adhesion and even pain for some people but after I looked in to documentation and how this device works and what support is expected and how to handle issues I felt pretty comfortable ordering. I ran though two sensors and each lasted entire 15days and I am on the third one right now 3 days in. My overall experience has been great and I will try to address some of the common issues and pitfalls you may want to avoid. This device is a derivative of Dexcom G7 that are sold for diabetics by pharmacies with prescription only, main differences between Dexcom G7 and Stelo from what I know are: 1) Dexcom G7 is 3 sensors 10 days lifespan each, while Stelo is 2 sensors with 15 days each 2) Dexcom G7 has calibration in the app, white Stelo does not have this feature. 3) Dexcom G7 has live support because it is a medical device for patients with diabetes and is only available by prescription. 4) Dexcom G7 costs more - that I think is the obvious one. Lets go over each one, Stelo explains in its documents that it expects over 80% of its sensors to last all 15 days it also mentions that should a sensor fail before 15 days they will replace it. They also mention that over 90% or so will last 10days This means that medical device G7 is limited to 10 days because of much higher survival time %, while Stelo is allowed to run 15days with bit higher probability of failure which reduces costs to the consumer - as they only get two sensors and they are protected from failures by replacements. There is no calibration because accuracy is not as important for average person without medical condition, and incorrect calibration may mess up accuracy. Consumer version is targeted for general trends and not for precision accuracy, I agree with this decision. Medical grade devices have phone support but they also cost significantly more and require prescription and doctor visits. When using Stelo you will be limited to chat and email support, but in most cases sensor failures will be reviewed and decision will be made about the nature of the failure. Company can monitor these devices and it knows when device fails and how based on telemetry form the sensor and how it failed. Expect that support will be weak but they will address failures and if they meet criteria - these will be replaced. If sensor fails for me I will post the process and update. Now about the device and user experience - it is important that you apply the sensor properly and in the correct are, if you make a mistake here - sensor will not be covered by warranty. Watch some videos, learn how prep the area, how to find the right area, how to best position the applicator. Simple rules are to look for fat on the back of the hand, with your finders find the fatty are - avoid muscles. if you apply this to a muscle - you will bleed, you will be in pain and you will kill the sensor. If you use the included patch it lasts 15 days no problem, but this patch is soft and you will notice the sensor more, if you get high quality patch with a hole for G7 then it is thicker and will distribute movement better and sensor basically disappears. I added photos of the patch I use from Onida and it made a big difference. The app is very simple and well made and works amazingly well, you can bring sleep data, exercise data and food data right on to the chart via Google Health Connect if you track and monitor those activities in other apps. Over that last 30+ days I saw disconnected sensor few times, it was always when i was not near my phone and it reconnected on its own once I was close. Having a phone on, in the same room works fine, it is only when you go in to another room it may loose connection. Apple seems to have support for direct connection to watch so sensor talks to the watch and phone is does not need to be close by. Spend time making sure area you apply the patch to is clean - use alcohol to remove oils, make sure you place the sensor in the right area, add high quality patch. Placement is most important part of the process, take your time note what worked. For me placing the sensor with release button facing the shoulder was resulted with best experience, actual filament entry is on that side. Some advice I got from others, is to apply next sensor while existing one is still working and let that new sensor warm up before switching to it, some people do it 30min before and some people do it 12 hours before the switch so data is most accurate and there is not gap in the data. Sensor will continue to work 12 hours after 15 days are up and I tested that on my last sensor, where app said sensor life is over and it showed 12 hour countdown reminding me to switch over to new one. *** This is first update on Jan 23 and I plan to update again after I complete all 4 sensors. *** This is an update on Feb 8, I completed third sensor that also lasted all 15 days and worked 12 hours after it expired officially.

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.