# Biosense by Readout — user reviews > 60 indexed App Store user reviews of Biosense by Readout by Readout, Inc., rated 4.32/5 from 1,298 ratings. - Source: https://appshunter.io/ios/app/biosense-by-readout/id1484991085/reviews - App overview in markdown: https://appshunter.io/ios/app/biosense-by-readout/id1484991085.md - Rating breakdown: 5★ 936 · 4★ 124 · 3★ 66 · 2★ 54 · 1★ 117 ## What do users think of Biosense by Readout? Overall sentiment: neutral **Pros** - 🚀 Easy to track ketones - 📈 Helpful for monitoring ketosis - 💡 Innovative technology - 👍 Useful device and app - 🔋 Unlimited testing **Cons** - 🐛 Buggy app and connectivity issues - 🕰️ Slow app performance - 🤖 Poor customer support - 📊 Limited data tracking and visualization - 💰 High price point **Commonly reported bugs** - App crashes and freezes - Bluetooth pairing problems - Inaccurate readings and data sync issues - Inability to edit or customize data **Most requested features** - Integrate with Apple Health and other apps - Customizable target ranges and settings - Improved user interface and design - Community features and user forums ## Newest reviews (10 of 60) ### 2/5 — App is form over function and buggy programing *2023-09-13* It’s a diet app, right? So recording your weight accurately is pretty core to its function. But the programers have chosen cute sliders and rollers to enter data into the program instead of straight forward typing the data. This makes it more time consuming to input the information as the values scroll over and under the target and in some cases refuses incremental integers jumping up or down by a value of 2. The device itself appears to work well, and is probably approximating my level of ketosis. It’s results are displayed on a daily, weekly and monthly graphs, but if I scroll back and look at the previous week, the last for days of the week’s data is missing. The device is a motivational benefit to successful dieting, but the poor design and execution of the app doesn’t inspire confidence. ### 3/5 — Great idea but, not ready *2023-07-17* The software and firmware appear to be in beta release. It’s a great concept and I am excited to see the final version. The sensor takes over three minutes to prepare the device (boot). It sometimes gets stuck in an endless loop, and ignores the buttons, needing to wait for the battery to die and hard reset. The phone app does not graph measurements with a zero value. It struggles to connect with Bluetooth while the sensor is operating (hit or miss). The app sometimes skips a week of readings. I have been using daily or three months. ### 2/5 — Help! *2022-11-09, version 3.3.0* When it works, I am happy with it, but when you need customer support, it is pretty much non-existent. I have spent hours trying to find customer support in order to get my device working again. I am having trouble logging in, and then can’t get things to sync, and also can’t get the ‘blow’ part to recognize my breath - and don’t tell me to blow harder. That is not the issue. I find very few FAQs that have the answers with the questions. Please, someone head me in the right direction for support. I would like my device working once again. Thank you. ### 2/5 — Only useful for graphing ACE *2022-09-05, version 3.3.0* The App is bare bones. It dies integrate with Apple Health or any other apps. It basically keeps track of your ACE levels. There is a fasting timer included and a bunch of articles. What’s missing is importing your activities, exercise, etc from apple health. I have no desire to manually entering my exercise or weight everyday when all my other apps such as map my fitness, Strava, Cyclemeter, and apple health all coordinate together. The app has a very long way to go. ### 3/5 — Good app, needs work *2022-07-31, version 3.2.3* Overall it is a good app, however is not easy to navigate, and not quite user friendly. There should be a better way to get to our information, more accessible information on our progress and where we should be, and info on tracking our journey, perhaps reminders for fasting, alarms or notifications, advice on what to do when our metabolic rate decreases or we fall off track.. little fixes here and there. Overall good but I feel it will improve deeply with time and as this product gains popularity. **Developer response:** Check out the new Biosense app (3.3.0) made available on Aug 16. Ketosis Dosing, Fat Burn Insights, Metabolic Content, Customizable Home Screen, and New Ways to Track Your Progress. Please update your app review if we've successfully addressed your needs. Reach out to us at support@mybiosense.com if you have any questions. ### 2/5 — Devise keeps malfunctioning *2022-06-16, version 3.2.3* The device does a great job of measuring and providing feedback. The app is pretty good. Of issue is the manufacturing quality. After about two weeks the device froze and I had to mail it back they did something to restore its functionality and sent it back to me. Good overall reply. However now, a month later the device has ceased to be able to recognize breath when blown into it. I’ve contacted customer support and expect they will do the same as they did before, however, at the price point, quality for this device is questionable They did help me reset the device and it works again. **Developer response:** Check out the new Biosense app (3.3.0) made available on Aug 16. Ketosis Dosing, Fat Burn Insights, Metabolic Content, Customizable Home Screen, and New Ways to Track Your Progress. Please update your app review if we've successfully addressed your needs. Reach out to us at support@mybiosense.com if you have any questions. ### 3/5 — Get rid of the fasting meter *2022-04-05, version 3.0.0* There is no way to turn it off. Either add option for “not fasting” and option to make customized fasting/feeding windows, or at least an option to turn off completely. It’s meaningless and annoying to have this thing telling me about a fast I’m not in. At least for now I only want to measure ACEs, I use other more robust apps for monitoring fasts. ### 5/5 — Above average attention to user’s suggestions *2022-03-30, version 3.0.0* Biosense has provided an extraordinary level of attention to my suggestions for improvements to their latest version of the app that is used with their Ketone measurement device. They set up a call and reviewed all issues, one at a time, with several being added to their dev list. They recently updated their device and after a problem, replaced the sensor in my device. It now “prepares” much faster than before. Note that this device does NOT require any on-going subscription. **Developer response:** Check out the new Biosense app (3.3.0) made available on Aug 16. Ketosis Dosing, Fat Burn Insights, Metabolic Content, Customizable Home Screen, and New Ways to Track Your Progress. Please update your app review if we've successfully addressed your needs. Reach out to us at support@mybiosense.com if you have any questions. ### 5/5 — BioSense app *2022-03-25, version 3.0.0* This application is barely usable. The only function that works consistently is keeping track of your ketone readings from the BioSense device. The fasting option is pretty good when it work. It acts as a reminder for the fast, but does not have an alarm feature when the fast is near starting or ending. It sometimes scrambles the fasting start time and when it does there is no way to go back to a previous day to edit the settings. As far as fasting, when you get into a routine the app is not very useful since you have no way to access your fasting history. On the setup screen when attempting any of the profile settings (ie. Birthdate, height, weight, etc) the little wheel in the center of the screen just spins for many minutes. **Developer response:** Check out the new Biosense app (3.3.0) made available on Aug 16. Ketosis Dosing, Fat Burn Insights, Metabolic Content, Customizable Home Screen, and New Ways to Track Your Progress. Please update your app review if we've successfully addressed your needs. Reach out to us at support@mybiosense.com if you have any questions. ### 3/5 — Latest Version Needs Help! *2022-03-24, version 3.0.0* I respect change takes time, and though an improvement, the latest version is lacking and not easy to understand, nor can you customize fast (only comes with basic TRE protocols) and adding items such as activity, is flawed (you can’t see how to add hours or minutes easily) and typos are uneditable or fixable). I reached out to them and they said updates were to expected in the week, but so far, nothing. I hope to have a better experience with the sorely needed update. An app that doesn’t work well with a device that costs a lot of money (to me) should be much better than it is. **Developer response:** Check out the new Biosense app (3.3.0) made available on Aug 16. Ketosis Dosing, Fat Burn Insights, Metabolic Content, Customizable Home Screen, and New Ways to Track Your Progress. Please update your app review if we've successfully addressed your needs. Reach out to us at support@mybiosense.com if you have any questions. ## Most critical reviews (10 lowest-rated) ### 1/5 — Terrible customer service *2024-07-15* Customer service is terrible with this company. It takes days-weeks for a response, if you get one at all. For a company claiming to have high technological device, they fall very short is customer service, help and refunds. As well, upon installation the app repeatedly crashed. Both my husband and I have tried our own individual devices and are extremely disappointed. We would not recommend this company. ### 1/5 — No contact , difficulty in adding in weight . *2023-06-24* Well it took a very long time to receive this item . I am having trouble putting in my weight , the way you enter your weight is with a slider bar , but I have never been able to put in my correct weight because the slider bar goes 1 lb over or 1 lb over the number I want to go . So I tried to contact someone and when go to the “contact us” option it just goes to the page where they want you to by the Biosense gadget. There should be a option to put in weight with actual numbers not a slider bar that doesn’t work , and no contact or email to contact for assistance . ### 1/5 — Garbage *2023-01-09* The app is irrelevant if the quality of the device is garbage. I have tested my blood , urine and breath to find that my urine and blood ketone levels have been consistent however the biosense breath test shows little to no ketones at all. I am doing a water only fast, day 14 now so my conditions are correct . biosense customer service makes nothing but illogical excuses why it doesn’t work rather than replacing or fixing the device . Terrible company . ### 1/5 — Simply doesn’t work *2022-11-15, version 3.3.0* Wont pair, won’t allow me to set the time, and won’t allow me to update the firmware. Recently, they also removed their history functionality on the app update (it’s much worse now, which I didn’t think was possible). I wish I could help you stay away from this company, but if you’re already here it’s probably too late. Don’t waste your time on this device (or this fisher-price designed app). ### 1/5 — No Privacy *2022-10-24* If you read their privacy policy they will be sharing all your private medical data generated from their app with just about anyone they like. App will be deleted and Biosense reader returned. ### 1/5 — Real disappointment *2022-07-04, version 3.2.3* I regularly read thevacetone levels in my breath with the Biosense device. But using the app with it is actually painful. It often doesn’t give me the values on the meter when I connect with it. It also gives me instructions to edit readings in settings and I can’t find the settings anywhere on the app. The app will close by the time my Biosense meter has heated up to take the reading. So I always need to open it at the last minute when trying to get a reading on the app. As much as I love the meter I really have nothing positive to say about this app at all. ### 1/5 — App no longer user friendly for fasting *2022-04-19, version 3.0.1* Last update canceled the option of choosing the length of a fast. The maximum time you can choose now is 36 hours. You can no longer customize it either. A lot of people are really unhappy about that. Biosense promised a while ago to bring the option to customize a fast back but we are still waiting… I wish they would just stop the promises and fix it already! I can no longer recommend the device because of this issue. There are cheaper models out there that don’t connect to an app. I chose to pay more because of what the app was able to do in the past. Right now I regret paying more as the app is useless. Please fix asap! **Developer response:** Check out the new Biosense app (3.3.0) made available on Aug 16. Ketosis Dosing, Fat Burn Insights, Metabolic Content, Customizable Home Screen, and New Ways to Track Your Progress. Please update your app review if we've successfully addressed your needs. Reach out to us at support@mybiosense.com if you have any questions. ### 1/5 — Extremely disappointed *2022-04-04, version 3.0.0* Bought this thinking it would help me with my food choices on a daily basis but instead, got useless info. The battery life is crap, you have to keep it in the ugly protective storage packet (why not make something that’s a bit better to store it in?!), you have to keep it away from many substances that could affect it, can’t use it at all if you have had any alcohol, and as mentioned earlier the data is crap unless you’re eating STRICT keto or fasting for longer than 24 hours. So for a daily use case, this product is not what you need. Use the $$ you would have spend on this and get yourself a CGM instead. You will have way batter data on how different foods affect your body. **Developer response:** Check out the new Biosense app (3.3.0) made available on Aug 16. Ketosis Dosing, Fat Burn Insights, Metabolic Content, Customizable Home Screen, and New Ways to Track Your Progress. Please update your app review if we've successfully addressed your needs. Reach out to us at support@mybiosense.com if you have any questions. ### 1/5 — Horrible update! *2022-03-31, version 3.0.0* Have been using Biosense for several years. The recent update is absolutely horrible. Virtually impossible to track my information. It used to be so user-friendly and I could track my ketone values easily. Then they decided to be all to everyone added all the new complexities and lost track of their best features. Sure wish I could offload the new upgrade ### 1/5 — Abysmal Onboarding and Password Config *2022-03-29, version 3.0.0* I’ve had the app for a little less than 24 hours and have been logged out 2x automatically. Further, when I try to log back in I’m told the password doesn’t work. To make it worse when I try to reset the password I do not receive an email at my email address. For several hundred dollars this is unacceptable team… please help. ## Most praised reviews (10 highest-rated) ### 5/5 — I am not overweight, however… *2024-03-22* After just 10 days I would not be without my monitor! I am not overweight, however I did have excess body fat and the Biosense unit shows me exactly where my fat burn is at. In my opinion It is perfect for helping to keep any one who is serious about being healthy and starting a new journey , on track toward their target goals and being able to achieve positive results!! ### 5/5 — Biosense is a Game-Changer! *2023-02-05, version 3.3.4* This app plus my Biosense monitor are amazing. For years I’ve been pricking my finger, buying pricey strips, buying alcohol wipes, buying lancets, and buying disposal containers to measure ketones and glucose. Goodbye to all that! I could never afford or find time to monitor more than once a day. Supportive emails and sections of the app explain what ketosis is and what the benefits are. I can use the biosense 3-4 times a day to monitor the effect of food, exercise, etc. I am losing .5 pound daily and staying in moderate ketosis. This is amazing! BTW I am 70 years old. This will be so beneficial to my health. ### 5/5 — Best way to monitor keytones *2023-01-07, version 3.3.0* By making it so easy to accurately measure your keytones, BioSense removes a layer of complexity from maintaining nutritional ketosis so you can focus on what and when you are eating. Getting feedback on the impact of what you are eating allows you to make the necessary adjustments to customize your diet to achieve your goals. I wish their marketing was less focused on weight loss. Nutritional ketosis can help you achieve so much more. PS: Great customer service. ### 5/5 — Endless measurements glee *2022-12-31, version 3.3.0* I got tired of the $$$ keto and glucose strips and when you barely eat carbs checking blood sugar starts to become moot. But I like seeing my ketones in real time throughout the day and how I can use my meals and habits to influence them. This is the most useful tool I’ve discovered yet on my journey. ### 5/5 — Anyone that is serious about the keto diet ought to get the Biosense Ketone Meter! *2022-09-13, version 3.3.0* The Biosense ketone meter and app is an incredible tool to have in your arsenal for anyone that is serious about the keto diet! The developers have put a lot of hard work in with continuous updates and improvements to ensure that the app is the best that it can be! They even do occasional firmware updates which improves the way the meter itself performs. I love being able to test my own personal limits of carb consumption by using the meter to test before and after a meal and see what my ketone levels are and how the meal affected them. The app contains many great resources and articles for those that want to learn more about the keto diet and its many benefits. The charts and ketone score created when you blow into your meter to test are great ways to motivate yourself and see your progress and how it correlates to your results! Anyone that is serious about the keto diet ought to get the Biosense Ketone Meter! **Developer response:** Thank you for the positive feedback. We're working hard to help you on your metabolic health journey. ### 5/5 — New app update is amazing!! *2022-08-20, version 3.3.0* I bought the device and downloaded the most recent app. I love to see my ACEs levels and the app keeps me motivated to get my ACEs up and in a fat burning range. It’s the only device and app I’ve found that helps me validate that my diet and lifestyle are working. I use the new fasting clock every day. Love it and have recommended it to my friends and family. ### 5/5 — Love the new app update! *2022-08-18, version 3.3.0* The Biosense app and device are making it so EASY for me to track my ketones. I use it after I workout, during my fasts, and in the morning and night. It helps me make decisions all day long that keep me in ketosis. ### 5/5 — Such a nice update! *2022-08-17, version 3.3.0* So good to see a company listen to its users. Thank you for the enhancements to the app. Looking forward to getting back on track using biosense, esp. with this new and improved interface. ### 5/5 — Active minutes *2022-06-15, version 3.2.3* App does not sync with Apple Health. Exercise minutes do not sho up. Biosense does not show up in settings For Apple Health, which is needed for the metabolic score. Using an iPhone se 2020 Update fixed these issues. Good job! ### 5/5 — A disaster upgrade *2022-04-03, version 3.0.0* I am really sorry for all the hours and efforts that was put in this software upgrade but it is MUCH worse than the previous one to the point that I am shopping for another keto measuring device and related App and moving the BioSense in my drawer labeled failure products. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*