# Accutension Stetho — Validator for BP monitors > Calibrates home blood pressure monitors using Korotkoff sound analysis. (iPhone/iPad app by Shanghai Hulu Devices Co Ltd.) - Source: https://appshunter.io/ios/app/accutension-stetho/id1056669469 (this page in markdown: same URL + `.md`) - Developer: [Shanghai Hulu Devices Co Ltd](https://appshunter.io/developer/1053971681) - Category: Health & Fitness - Price: Free - Rating: 2.10/5 from 7 App Store ratings · 10 written reviews indexed - Age rating: 12+ - Requires: iOS 7.0 · 40 MB - Languages: American English, German (Germany), Japanese, Korean, Polish, Chinese (Simplified, China), European Spanish, Chinese (Traditional, Taiwan) - Released: 2015-11-18 - Data updated: 2026-06-01 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/accutension-stetho/id1056669469/reviews.md ## What is Accutension Stetho? Accuracy of blood pressure matters. Inaccurate blood pressure is worse than none. However, according to Harvard health, 15% blood pressure monitors are very inaccurate (http://www.health.harvard.edu/blog/home-blood-pressure-monitors-arent-accurate-201410297494). Accutension Stetho is the first calibrator for home blood pressure monitors. Home blood pressure monitors use algorithm to determine blood pressures and its accuracy depends on users and body conditions. With the algorithm calibrated, you will have higher confidence on the blood pressure readings. It records, visualizes and plays back the sounds (Korotkoff sounds) of your blood flow during blood pressure measurement and help you use the sounds to find out blood pressure readings. It is the same method a doctor measures blood pressure with a manual blood pressure cuff and a stethoscope. When you take blood pressure with an automatic blood pressure monitor, the display of the monitor shows the cuff pressure in real time. Accutension Stetho App records the cuff pressure showed on the monitor and synchronizes the pressure readings with the sounds from the stethoscope. When the first Korotkoff sound appears, the cuff pressure is Systolic blood pressure, when the Korotkoff sounds disappear, the cuff pressure is Diastolic blood pressure. For every measure, you will have two sets of blood pressure readings, one from the automatic blood pressure monitor and another from Accutension Stetho App. If the difference of these two sets of values is small (less than 5mmHg), the algorithm of your automatic blood pressure monitor is accurate. If the difference of these two is bigger than 10mmHg, you might need to talk to your doctors on this because the inaccuracy of your automatic blood pressure monitor could affect the diagnosis and treatment of hypertension. With Accutension Stetho, you can hear the Korotkoff sounds in real time during measurement or during playback. You can also email the video with Korotkoff sounds to your doctors or friends to confirm your blood pressure readings. Find discrepancies and get accurate readings from today! Disclaimer: ACCUTENSION STETHO IS DESIGNED AS A CALIBRATOR TO SCREEN THE ACCURACY OF ABPMS ON INDIVIDUALS, NOT FOR DAILY BP MANAGEMENT. ACCUTENSION STETHO IS NOT A MEDICAL DEVICE AND YOU CANNOT USE IT FOR THE DIAGNOSIS OF DISEASE OR OTHER CONDITIONS, OR IN THE CURE, MITIGATION, TREATMENT, OR PREVENTION OF DISEASE. WHEN ACCUTENSION STETHO IS USED, BP READINGS FROM BOTH YOUR ABPMS AND YOUR ACCUTENSION STETHO APP SHOULD BE ABANDONED FOR ANY PURPOSE OTHER THAN CALIBRATION. ACCUTENSION STETHO ONLY CHECKS THE ALGORITHM OF ABPMS. THOUGH THE ALGORITHM IS ONE OF THE MAJOR SOURCES OF BP MEASUREMENT DISCREPANCIES, THERE ARE OTHER SOURCES OF BP MEASUREMENT DISCREPANCIES ACCUTENSION STETHO CANNOT DETECT. FOR INSTANCE, ACCUTENSION STETHO CANNOT DETECT THE INACCURACY CAUSED BY THE MISFUNCTION OF THE PRESSURE SENSOR OF YOUR ABPM OR INCORRECT CUFF SIZE. THE CALIBRATION RESULT IS ONLY INFORMATIONAL AND YOU SHOULD CONSULT YOUR PHYSICIAN OR A QUALIFIED HEALTH PROFESSIONAL ON ANY DISCREPANCIES YOU FIND ON YOUR ABPMS AND FOLLOW THEIR ADVICE ON THE USE OF ABPMS. ## Key features - Records Korotkoff sounds - Visualizes blood flow sounds - Synchronizes cuff pressure with sounds - Compares automatic monitor readings - Emails readings to doctors - Detects discrepancies in BP monitors ## Recent user reviews (10 of 10) All indexed reviews: https://appshunter.io/ios/app/accutension-stetho/id1056669469/reviews.md ### 1/5 — Crashes when video capture button is pressed. *2023-03-09, version 1.42.11* A key step for calibration of a BP monitor is the video capture that the user is supposed wtrigger when the BP monitor begins the depressurization stage. Each time I attempt to trigger the video capture, the application crashes. Given that the application hasn’t been updated since the pandemic, I suspect it never will be. ### 1/5 — Does not read the barcode from the box. *2018-10-25, version 1.42.9* Useless. Can only read QR code. My box has the old barcode and the app can not read it. Stupid... ### 4/5 — iPhone X *2018-04-11, version 1.42.6* App crashes before and after update . it worked on iPad using headphone jack but continues to ask me to register. I’m lucky I still have the box that has the code- Things are working now ### 1/5 — Minus 5 stars - it sucks now *2018-03-12* This update sucks now. I explain why below. The app crashing the moment the button to stop recording is pushed. The old version of the app didn't crash. Secondly, it doesn't work with Omron Evolve. The device will not pick up any sound no matter where I position to stetho. It works fine with Omron BP786N no problem. I could be because Evolv uses different technique, the air is inflated gradually and the monitor measures the blood pressure continuously from deflated state to fully inflated. This is the other way around that most monitors today measure. Personally I find it more comfortable - you don't get the numbing pain of something strangling your arm. So I prefer Evolv and it measures quite accurately compared to BP786N. Thirdly, and this is the biggest sucker of all. I'm pretty much sick of it. The app forces now the user to register the stetho after 3 tests. It won't continue to work. The only option is to go ahead with registration or delete and reinstall the app. Now the registration process sucks as well because it asks me to scan a QR barcode on the user manual or box. Don't have the manual anymore (threw away) and the box has no QR barcode. So I can't register and therefore the only option the application giving me is to re-purchase the stetho (again). Now if that's the way you want it, you know what it sucks and I'm going to pass on it. Not interested. Good bye. I would rate minus 5 stars if I could. **Developer response:** Sorry to see you missed your QR code. Please email us and we will send you a new one. Evolv measures during inflation and you may try to record during inflation. For inflation based technology, the first sound is diastolic BP and last sound systolic BP. ### 3/5 — Not working *2018-02-18, version 1.42.5* I was pretty excited when I received my device tonight, but alas, it’s currently a no-go. Every time that I start to record, the app crashes. I used both the “wizard” and “calibrate” modes. Crashes in both. I’m using an iPhone X and iOS 11.2.5. Anxiously awaiting a fix. Gave it three stars as a neutral rating. ### 5/5 — Hear the beating pulse *2017-03-04* Good, purchased at amazon too. After downloading the app, I started to check my ReliOn machine. The bp readings determined by the sound is close to the readings of my machine. I would use both every day and track one month to see what I would have. ### 5/5 — Works great *2017-03-04* This app wroks just fine with my Omron 10 series, model BP653, and iPhone 7. Purchased the devices on amazon and then use them together. I downloaded the app and went through the process of calibration following the manual in the box. That wasn’t hard to do like somebody else said. ### 5/5 — Awesome and useful device *2017-02-27, version 1.33* This app helps check the automatic blood pressure monitor’s accuracy. Put the stethoscope over the arm and run the app to start the calibration. It tracks blood pressure readings and allows me to record the deviation between the monitor and the Stetho. Awesomely useful to me. I like the videoing function which can help me track my blood pressure readings from using both the sound method and the automatic pressure monitor’s method. ### 5/5 — A reliable app *2017-02-27* The device is accurate and easy to use with the app. My only problem is how to video my blood pressure measurement with one hand. Probably after several practices, I could be skilled. ### 5/5 — Simply excellent! *2016-01-22, version 1.0* As an American consumer my limited experience with completely China-based products has mostly been a disappointment. My guess is most of it stems from cultural and language barriers. Their instructions are often inscrutable and products are of questionable quality. But Accutension Stetho and its associated app are surprisingly wonderful exception. Both the app and the product work well. The app did crash on me the first time I tried to use it on my iPad Air 2 but worked stably after reopening it. One must bear in mind that the app is compatible but isn't optimized for the iPad's larger screen. I had to use the iPad Air 2 in order to record the blood pressure monitor readings for the Withings app on my iPhone 6 that was wirelessly connected via Bluetooth to the Withings Blood pressure monitor as I couldn't use both the Withings app and the Accutension Stetho app on the iPhone 6 at the same time. The written instructions in the app do have a few spelling errors (ignorable) and the writing style seems to be a little too technical for the average American consumer with short attention span. However, the instruction video in How to section makes most things fairly clear. Despite seeing the instruction video I had to google to find out what Korotkoff sound meant. Once I knew what those sounds were I could easily identify them in the graph. The graph of the Korotkoff sounds are very distinctive; hence, one can have both visual and auditory confirmation of blood pressure monitor readings. Overall, the app is off to a great start and with a little more polish, it should deliver on its full potential. The bottomline is the app is stable and the product works--you can buy it without fear of getting a lemon. ## Frequently asked questions about Accutension Stetho ### What is Accutension Stetho used for? Accutension Stetho is designed as a calibrator to screen the accuracy of automatic blood pressure monitors (ABPMs) on individuals. It helps users identify potential inaccuracies in their home BP monitors by analyzing Korotkoff sounds. ### How does Accutension Stetho work? The app records the cuff pressure from your automatic blood pressure monitor and synchronizes it with the Korotkoff sounds of your blood flow, similar to how a doctor uses a manual cuff and stethoscope. ### Can Accutension Stetho be used for daily BP management? No, Accutension Stetho is not for daily BP management. It is strictly designed as a calibrator to screen the accuracy of ABPMs and should not be used for diagnosis or treatment. ### What does a difference in readings mean? If the difference between your automatic monitor's readings and Accutension Stetho's readings is small (less than 5mmHg), your monitor's algorithm is likely accurate. A difference greater than 10mmHg may indicate an inaccurate monitor that could affect diagnosis and treatment. ### What kind of sounds does Accutension Stetho record? Accutension Stetho records Korotkoff sounds, which are the sounds of blood flow heard during a manual blood pressure measurement. These sounds help determine systolic and diastolic blood pressure. ### Can I share my readings with my doctor? Yes, you can email the video with Korotkoff sounds and pressure readings to your doctors or friends to confirm your blood pressure readings and the accuracy of your monitor. ### What devices is Accutension Stetho available on? Accutension Stetho is available for iPhone and iPod devices. ### Is Accutension Stetho free to use? Yes, Accutension Stetho is a free application and does not have any in-app purchases or advertisements. ## Version history (last 5 releases) ### 1.42.11 — 2019-03-21 Fixed a bug for iPad. ### 1.42.10 — 2019-03-15 Fixed a bug for new iPhone. ### 1.42.9 — 2018-09-06 fixed a bug for iPod touch ### 1.42.8 — 2018-08-22 fixed a bug ### 1.42.7 — 2018-05-02 fixed a bug and optimized support for iPhone X. ## Apps similar to Accutension Stetho | App | Rating | Price | Category | | --- | --- | --- | --- | | [Fox River MedSpa](https://appshunter.io/ios/app/fox-river-medspa/id1618493940) | — | Free | Health & Fitness | | [Ravs Fitness](https://appshunter.io/ios/app/ravs-fitness/id1613306660) | — | Free | Health & Fitness | | [Megaphone Fitness](https://appshunter.io/ios/app/megaphone-fitness/id1616666520) | 5.0 (1) | Free | Health & Fitness | | [FITJO](https://appshunter.io/ios/app/fitjo/id1605626660) | — | Free | Health & Fitness | | [Mood Pulse AI: Emotion Tracker](https://appshunter.io/ios/app/mood-pulse-ai-emotion-tracker/id6739698644) | 5.0 (1) | Free | Health & Fitness | | [HealthPulse - Workout & Diet](https://appshunter.io/ios/app/healthpulse-workout-and-diet/id1560303335) | 3.7 (3) | Free | Health & Fitness | ## More apps by Shanghai Hulu Devices Co Ltd - [Accutension Blood Pressure Kit](https://appshunter.io/ios/app/accutension-blood-pressure-kit/id1067641040) - [Stemoscope](https://appshunter.io/ios/app/stemoscope/id1448663751) - [BabyStemo: hear baby heartbeat](https://appshunter.io/ios/app/babystemo-hear-baby-heartbeat/id1473771119) - [PetStemo: Monitor pet health](https://appshunter.io/ios/app/petstemo-monitor-pet-health/id1491456896) - [DrStemo](https://appshunter.io/ios/app/drstemo/id1660937732) All apps by Shanghai Hulu Devices Co Ltd: https://appshunter.io/developer/1053971681 --- *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 2026-06-01.*