# Biosense by Readout > Clinically validated tracker for fat burn, ketone levels, and metabolic health insights. (iPhone/iPad app by Readout, Inc..) - Source: https://appshunter.io/ios/app/biosense-by-readout/id1484991085 (this page in markdown: same URL + `.md`) - Developer: [Readout, Inc.](https://appshunter.io/developer/1478138499) - Category: Health & Fitness, Medical - Price: Free - Rating: 4.32/5 from 1,298 App Store ratings · 60 written reviews indexed - Age rating: 4+ - Requires: iOS 11.0 · 164 MB - Languages: English - Released: 2019-12-11 - Data updated: 2026-06-10 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/biosense-by-readout/id1484991085/reviews.md ## What is Biosense by Readout? Discover Your Healthiest Self The medical grade, clinically validated Biosense Fat Burn (ketone) Tracker provides you with a full picture of how fat burn levels change throughout the day based on diet, activity, and fasting. WHY BIOSENSE Closes biofeedback loop to help you optimize fat burn and improve metabolic health FEATURES INCLUDE - Ketone Dose to summarize how long and deeply you’ve been in ketosis on any given day - ACEs to see your real-time metabolic response to sleep, diet, fasting, and exercise - Fasting Clock to monitor increasing ketosis levels to optimize fast - Curated metabolic content to help you understand your body’s fat burn signals and take action - Data tracking to visualize your progress over time FAT BURN MONITORING, PERFECTED - Clinically validated accuracy - No finger pricks - Unlimited measurements THE BIOSENSE DIFFERENCE - Medical grade / clinical trial backed - Highly specific fat burn levels and insights - Full day picture of ketosis levels - Precision fasting clock Visit https://mybiosense.com/ to learn more. 
 Visit https://mybiosense.com/metabolic-minute/ for the latest metabolic health content. The Biosense app is not designed or intended to diagnose, treat, cure, or prevent any disease or condition; it is intended for general-wellness purposes only. Users should make medical decisions through consultation with their physicians, and not based on any information presented in the Biosense app. ## Key features - Ketone Dose tracking - Real-time metabolic response (ACEs) - Fasting Clock for ketosis optimization - Curated metabolic health content - Progress data visualization - No finger pricks required ## 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 ## Recent user reviews (10 of 60) All indexed reviews: https://appshunter.io/ios/app/biosense-by-readout/id1484991085/reviews.md ### 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. ### 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!! ### 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. ### 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 . ### 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. ### 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 . ### 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. ### 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). ## Frequently asked questions about Biosense by Readout ### What does the Biosense app do? The Biosense app provides a medical-grade, clinically validated way to track your fat burn and ketone levels throughout the day. It helps you understand how your diet, activity, and fasting impact your metabolism and offers insights to optimize your metabolic health. ### What are the key features of Biosense? Key features include Ketone Dose to track time and depth in ketosis, ACEs to monitor real-time metabolic responses to sleep, diet, fasting, and exercise, and a Fasting Clock to optimize fasting periods. It also offers curated content and data tracking to visualize progress. ### Is Biosense free to use? The Biosense app itself is free to download and use. However, the description implies that the full functionality and medical-grade tracking may involve in-app purchases or require a connected device, as it mentions 'unlimited measurements' and 'clinically validated accuracy' which often come with hardware. ### What is the Biosense app for? The app is intended for general wellness purposes, helping users discover their healthiest selves by understanding and optimizing their fat burn and metabolic health. It is not designed to diagnose, treat, cure, or prevent any disease or condition. ### How accurate is Biosense? Biosense is described as having clinically validated accuracy and being medical-grade. This means its measurements and insights are backed by scientific research and clinical trials, providing reliable data on your body's fat burn levels. ## Version history (last 5 releases) ### 3.3.4 — 2023-01-24 Bug fixes and integration with Apple Health Kit ### 3.3.0 — 2022-08-16 - New features - Bug fixes - Several performance and feature improvements ### 3.2.3 — 2022-06-14 Bug fixes and new features ### 3.0.1 — 2022-04-19 Bug fixes and app stability ### 3.0.0 — 2022-03-11 Brand new App experience ## Apps similar to Biosense by Readout | App | Rating | Price | Category | | --- | --- | --- | --- | | [Ketonix](https://appshunter.io/ios/app/ketonix/id1239051593) | 2.3 (6) | Free | Health & Fitness | | [Key to Health: Metabolic AI](https://appshunter.io/ios/app/key-to-health-metabolic-ai/id1441365703) | 4.8 (2,238) | Free | Health & Fitness | | [The Fasting Method](https://appshunter.io/ios/app/the-fasting-method/id1571760038) | 4.8 (145) | Free | Health & Fitness | | [KETOSCAN](https://appshunter.io/ios/app/ketoscan/id1446527194) | 2.7 (15) | Free | Health & Fitness | | [Signos](https://appshunter.io/ios/app/signos/id1534943157) | 4.6 (969) | Free | Health & Fitness | | [Ice - Your Body Belongs to You](https://appshunter.io/ios/app/ice-your-body-belongs-to-you/id482857500) | 1.5 (4) | Free | Health & Fitness | ## More apps by Readout, Inc. - [MBL949A12201](https://appshunter.io/ios/app/mbl949a12201/id1602266384) - [Journeys Metabolic](https://appshunter.io/ios/app/journeys-metabolic/id6446496363) All apps by Readout, Inc.: https://appshunter.io/developer/1478138499 --- *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.*