Do you need help?

See our instructions and frequently asked questions (FAQs). If you can’t find what you are looking for, or you have feedback regarding CardioSignal, please contact support@cardiosignal.com. We will help you out shortly!

Instructions for use (PDF)

English, Finnish, Bulgarian, Danish, Dutch, French, German, Italian, Norwegian, Spanish , Swedish

You can also find instructions in the CardioSignal application under Measure view

FAQs

General

  • CardioSignal is a mobile application and a CE class IIb marked medical device. The application is available for iOS and Android smartphones. CardioSignal utilizes a patented technology that is clinically proven to detect signs of atrial fibrillation with high accuracy (see: validation). If CardioSignal detects signs of atrial fibrillation, you need a heart health assessment by a healthcare professional.

  • CardioSignal application is primarily intended to detect signs of atrial fibrillation. With the 1-minute measurement, you can also measure heart rate. Other important features include measurement history and measurement reminders.

  • Atrial fibrillation is an irregular and often abnormally fast arrhythmia. It is one of the most common arrhythmias and a significant cause of ischemic stroke. It may present without any perceivable symptoms. Atrial fibrillation can be treated, timely medical management is very important to reduce the risk of complications.

    Risk of developing atrial fibrillation increases with age and if you have, for example, high blood pressure, diabetes, unhealthy lifestyle, sleep apnea, or family history of atrial fibrillation. You can visit our Atrial Fibrillation page for further details.

    Risk of developing atrial fibrillation increases with age and if you have, for example, high blood pressure, diabetes, unhealthy lifestyle, sleep apnea, or family history of atrial fibrillation. You can visit our Resources section for further details.

  • The CardioSignal application measures your heart motion. It utilises motion sensors to collect and analyse heart motion data. This information can be used to detect signs of atrial fibrillation. The method, gyrocardiography, has been validated in clinical studies. CardioSignal is a class IIb medical device for detecting signs of atrial fibrillation.

  • Start by downloading the application in to your smartphone from Apple AppStore or the Google Play store. After installing the application you need to purchase a subscription or activate a sponsored access that, for example, your care provider may offer.

    If you cannot install the application, it is possible your device is missing the required sensors, or the application is not yet available in your country. See: How can I make sure CardioSignal will work with my phone?

Before usage

  • Yes, the CardioSignal application has been available as medical device since 2019. We are an ISO 13485 and ISO 27001 certified medical technology company. Our technology is based on over 10 years of academic research and clinical studies.

  • Yes, there are restrictions of use which you can find in the application onboarding or from the instructions for use (PDF) you can find the full list of warnings and cautions.

    • Individuals who have a cardiac pacemaker should not use the application. A powered on phone held close to a cardiac pacemaker can create electromagnetic interference (EMI), which may alter the function of the pacemaker.

    • The application is intended for individuals aged 18 years and older. The heart rate of children and adolescents can be significantly affected by their breathing rate and a normal heart rhythm might look irregular.

  • We have this restriction for your safety. A powered on phone held close to a cardiac pacemaker can create electromagnetic interference (EMI), which may alter the function of the pacemaker.

  • The device must have motion sensors (accelerometer and gyroscope).

    The device must meet minimum system requirements:

    • Android operating system version 9 or above

    • Apple iOS operating system 15 or above

    You can test the compatibility by downloading CardioSignal application from Apple AppStore or Google Play store. If you cannot find or install the application, it is possible your device is missing the required sensors, your device operating system is too old or the application is not yet available in your country.

  • No, downloading the app is free of charge, but a subscription needs to be purchased separately after account creation. You can find a direct link to subscription options inside the application.

Clinical considerations

    • No additional hardware is required, just your smartphone.

    • Easy 1-minute measurements

    • Reliability, our technology is patented and clinically tested to detect signs of atrial fibrillation with 94% accuracy.

    See more information in instructions for use.

  • You should discuss with your health care provider if CardioSignal measurements are useful to you.

    If you have been treated for atrial fibrillation (e.g. medical treatment, ablation) CardioSignal can be a good tool for early detection or reoccurrence of the signs of arrhythmia.

  • The intended use of CardioSignal is to detect signs of atrial fibrillation in adults over 18 years of age. If you have another arrhythmia, CardioSignal may provide you with ‘Signs of atrial fibrillation detected’ result. In such a case, it is however important you see a healthcare professional.

    CardioSignal cannot

    • detect other arrhythmias than atrial fibrillation

    • detect embolism nor stroke

    • detect heart attacks. If you ever experience chest pain, pressure, tightness, or what you think is a heart attack, call emergency services immediately

    • other cardiac or cardiovascular diseases

    If you are not feeling well, or you have any symptoms, contact your healthcare provider.

  • You should discuss with your health care provider if CardioSignal measurements are useful to you.

    If you have been treated for atrial fibrillation (e.g. medical treatment, ablation) CardioSignal can be a good tool for early detection or reoccurrence of the signs of arrhythmia.

Subscriptions & payment options

  • There are three subscription periods and prices available: one month (4,99€), three months (13,99€), and one year (34,99€). The subscription is renewed automatically according to the subscription period selected. For example, a one-month subscription renews every month, and is billed before the beginning of each new subscription period.

  • You can manage your app purchases and related subscriptions at any time in your phone settings.

    If you can’t find it on your phone, go to CardioSignal and open ‘Profile’ from the top right corner of the Activity screen → Manage subscriptions.

    The subscription plan cannot be updated during the current subscription period. Read more about Apple and Google instructions concerning a change in subscription:

    iPhone: How to switch to a different subscription plan – Apple Support (UK)

    Android: Cancel, pause, or change a subscription on Google Play - Android - Google Play Help

  • Unfortunately not, CardioSignal requires purchasing a subscription after installing the application and creating an account.

  • There is always the possibility to request a refund if you are not satisfied with an app store purchase. Apply for a refund within 48 hours to ensure a smooth processing with app stores:

    Apple: Request a refund for apps or content that you bought from Apple‍ ‍

    Android: Learn about refunds on Google Play - Google Play Help

  • Payments are managed via the Google or Apple subscription management system which can be accessed via your phone/device settings.

    Payment methods are tied to the options available in each app store, and they vary by country or region. You can check the ones available for you on

  • No. CardioSignal is a mobile application and the payment methods are tied to the payment options available in app stores. As a result, we cannot tailor them based on customer requests.

  • The following do not require linking you credit/debit card information to your app store account:

    • GooglePlay or AppStore gift card or code

    • Carrier billing, if supported by your mobile carrier

  • No, we do not have access to your credit card, as all payments go through app stores. You alone manage your app subscription in your phone settings.

  • Logging into your account is needed for subscription and payment management. Our payment system works via Google Play or the App Store where you install and purchase applications on your phone.

    • Your subscription is linked to the account with which the subscription is purchased.

    • In order for the application to verify the subscription, you must be signed into this account on your phone.

    • Please note that your CardioSignal user account can be created with another email address than the one linked to you application store account.

  • All our subscriptions renew automatically. You can cancel your subscription in advance, or at least 24hrs before the next subscription period starts to ensure the subscription won’t (accidentally) renew. After cancelling your subscription, you can use the measurement function until the end of the paid subscription time (1/3/12 months).

    Cancel an Apple subscription: If you want to cancel a subscription from Apple - Apple Support

    Cancel a Google subscription: Cancel, pause, or change a subscription on Google Play - Android - Google Play Help

  • Restoring the subscription is needed. Follow these steps:

    Scroll to the bottom of Purchase subscription screen and tap the ‘Restore’ link from the grey box → The subscription is restored, and you can continue taking measurements. If this does not help, please contact support@cardiosignal.com

Signing in & password

  • A valid email address and a password.

    1. Enter your email address and a preferred password on the application’s Sign Up-tab.

    2. The application instructs if the password is not valid. See What are the password requirements? for more information if you have trouble.

    3. Verify your account by opening a verification link sent to your email address. Please check your junk email folder as well.

    Check the link: What are the password requirements?

  • The account verification email might have gone to your junk email folder. Please check your junk email folder.

    If your email is working normally, and you can’t find the email in your junk email folder, please contact us at support@cardiosignal.com for further assistance.

  • Setting up a user account is needed to provide you the best possible service securely.

  • • Make sure you are on the Sign Up-tab while creating the account.

    • Make sure you are using a valid email address – your user account needs to be verified by opening a link sent to that email address.

    • If you got an error message ’We’re sorry, something went wrong when attempting to sign up’ you might already have a user account created with that email address. Try signing in on the Log In-tab.

    If the problem persists, please contact support@cardiosignal.com

  • After the user account has been verified, you can sign in to CardioSignal with your credentials on the application’s Log In-tab.

  • You can change your password by selecting the ’Forgotten your password?’ option on the application’s Log In’-view.

    • If you are signed in, log out first under ‘Profile’.

    • Tap the ‘Forgotten your password?’ option on the app’s Log In- view

    • You will receive an email for changing the password. Remember to check the junk email folder as well.

    • Open the *-marked link at the end of the message or copy it to your phone's browser and set a new password

  • The requirements for a valid CardioSignal password are:

    1) At least 8 characters in length

    2) Contains at least 3 of the following 4 types of characters:

    • Lower cases (a-z)

    • Upper cases (A-Z)

    • Numbers (ie. 0-9)

    • Special characters (e.g. !@#$%^&*)

    1. Make sure you are on the Log In-tab while signing in.

    2. Has the account email been verified? If not, signing in is not possible yet. Please go to your email and confirm your email by clicking the email confirmation link.

    3. Search for possible typos with Eye-icon.

    4. Change the password if needed, see How do I change my password?

    Please contact support@cardiosignal.com if you need further assistance.

  • CardioSignal login session should not time out in active use. In the rare case that this happens, log in again with your credentials.

    The application requests you to login again if you sign out of the application, if you have not used the application for 2 months, and every 6 months regardless of the measurement activity.

  • No, unfortunately, the email address cannot be changed. However, you can create a new user account on the application’s Sign Up-tab. Please note that the measurement history from the old user account cannot be transferred to the new user account.

  • Yes. You can view your earlier measurement results by using the same CardioSignal account.

    If you changed phone models from Android to iPhone or iPhone to Android, subscriptions are not automatically the same. You need to cancel your old subscription and purchase a new subscription using the new phone.

Measuring

  • Measuring with CardioSignal is easy.

    Before the measurement:

    - Do not measure right after exercising.

    - Remove any thick clothing, such as a jacket.

    Starting the measurement:

    - Lie on your back and relax.

    - Press Start.

    - Place the phone in the middle of your chest with the screen facing upward.

    - Keep your hands in a relaxed position at your sides.

    - Be still. Do not talk or cough during the measurement.

    After 1 minute, the analysis is complete and the application displays the results.

    If, in a rare case, you get repeatedly unsuccessful measurements with your smartphone, please remove the protective casing from your phone and try again.

  • We recommend measuring regularly, preferably twice daily. Atrial fibrillation is the most common cardiac arrhythmia, and it may occur only occasionally and without symptoms. That is why regular measurements maximize the possibility of detecting signs of atrial fibrillation.

    Read more from our blog about the importance of regular measurements: https://cardiosignal.com/blog/hows-your-heart-doing-why-regular-monitoring-pays-off

  • The measurement lasts 60 seconds. The end of the measurement is indicated by a sound, and by a vibration if the sound and vibration features are turned on.

  • There are many different types of protective casings and auxiliary devices which are directly connected to the phone (for example zoom lenses, popsockets, tripods, selfie sticks etc.).

    A successful measurement resulting in a reliable analysis result requires a close mechanical connection between the phone and the chest. In general, using any auxiliary device during measurement is not recommended as it can prevent the vibrations from the chest being transferred unaltered to the motion sensors of the phone. However, a thin protective casing may help the phone to stay still during the measurement. Some types of protective casings (e.g. thick and soft) can effectively corrupt tiny chest movements that the app needs to record and analyse. Wallets or flip cases attached to the phone can cause problems, especially if the cover is folded under the phone during measurement.

    → Remove any auxiliary device connected to the phone that prevents the phone from sitting flat on the chest before taking the measurement.

    → If you repeatedly get unsuccessful measurements, try to remove the protective casing to see if that helps.

  • Try the following tips:

    o Try placing a pillow under your head to get a better positioning.

    o Remove clothing that might cause the phone to move. You can also try taking a measurement on bare skin.

    o A thin protective casing may sometimes help the phone to stay still during the measurement.

  • Place the phone in the middle of your chest with the phone screen facing upwards.

    Make sure the phone stays still and does not slide during the measurement.

    To find the optimal place you can put 2-3 fingers between the upper edge of the phone and the upper edge of the sternum.

    Do not hold the phone with your hand during the measurement.

  • A measurement can be interrupted during the measurement by touching the counter or the Cancel button.

  • No, unfortunately, it is not possible to remove a reading/delete a measurement from the measurement history.

    We want to keep the measurement history as accurate as possible and to prevent accidental deletion of measurements.

  • The history might seem empty if you have not made measurements during the month.

    You can also browse your measurements by changing the month from arrow buttons.

  • Yes. The Wi-Fi or mobile internet connection must be turned on when using the application. Please note that the use of mobile data may cause additional costs depending on the phone subscription, especially when you are abroad.

Results

  • Repeat the measurement as instructed by CardioSignal, and carefully follow the instructions for correct measurement. If after a ‘Repeat a measurement’ result you get a ‘Signs of atrial fibrillation’ result, contact your doctor or care provider. Show your CardioSignal records to your healthcare provider. The assessment may include at least an ECG examination.

  • If CardioSignal detects signs of atrial fibrillation, you should always see a medical professional for further evaluation. If you have done this and the result persist please make sure that you have followed the instructions for using CardioSignal. See for example ‘Are there situations when I shouldn’t use CardioSignal?’ as well as ‘How do I measure correctly?’.

    If you suspect problems with the measurement, please contact support@cardiosignal.com

  • Keep taking regular measurements. We recommend measurements in the morning and in the evening. Regular measurements are important because atrial fibrillation can also occur occasionally and without symptoms.

  • If the measurement is unsuccessful, you will be notified and advised to repeat the procedure. Check the measurement instructions to ensure that you have performed the measurement according to the instructions. An unsuccessful measurement can be caused by several different reasons:

    • The phone moved during the measurement. If the phone detects excessive movement during the measurement, the measurement might be unsuccessful.

    • The phone does not have the required sensors or there is something wrong with the sensors.

    • The measurement data cannot be interpreted. The data produced by the motion sensors is unreadable for some reason.

    • The phone was in the wrong position during measurement. The phone must be in the most horizontal position possible.

    • The measurement was performed with the phone in an inappropriate place on the body or not on the body, for example on a table, and the heart signal was not detected.

    • The heart rate was outside the 40–160 beats per minute range. CardioSignal is designed to work in the heart rate range of 40–160 bpm.

    • The phone may need to be restarted. Some phone models are reported to provide erroneous sensor data, but turning the phone off and on again may fix the problem.

    • If the measurement fails repeatedly, contact customer support by email at support@cardiosignal.com

Other features & settings

  • The Vitals section of the Result view displays the average heart rate and cardiogram.

    Please note that the cardiogram is not an ECG curve, because the method used by the application is based on motion sensors.

  • Heart rate tells you how often your heart beats in a minute (bpm=beats per minute). Do not take the measurement after exercising, because your heart rate will be unnaturally high.

  • Cardiogram displays a visualization of the heart signal during the measurement. Please note that the cardiogram is not an ECG curve, because the method used by the application is based on motion sensors.

  • CardioSignal application is designed to detect signs of atrial fibrillation, and clinically validated for this purpose. The Vitals should not be used for medical purposes or basis for medical decision-making, but they do provide additional insights and value to your measurements from wellness perspective.

  • Vitals results do not in any way reflect the application’s ability to detect signs of atrial fibrillation. CardioSignal application is designed for atrial fibrillation detection, and we have validated and conducted clinical studies specifically to confirm this capability.

    Our application can also be used for measuring Vitals (HRV, heart rate, breathing rate). This is not part of the application’s intended use, and as such, is non-medical information.

  • CardioSignal measurement results can exported out as a PDF document. The functionality can be found under Vitals -> Share for a chosen measurement result.

  • The Activity view on the application’s Activity screen shows your measurement activity of the selected month. The Result view is divided into two tabs: Result (Medical, Atrial Fibrillation) and Vitals (HR and Cardiogram).

  • In the application settings.

    Open Profile from the top right corner of the activity screen -> Scroll down to Reminders under Measurements -> Select Set a reminder. Once you have set a desired reminder -> Tap Save

    Select the time of your choosing and the frequency (every day, on weekdays, on weekends) for the reminders.

  • Change the sound and vibration settings in the application settings.

    Open Profile from the top right corner of the activity screen -> Scroll down to Sound & vibration under Measurements -> Toggle sound and/or vibration ON or OFF.

    Please note that if the sound & vibration is set ‘OFF’ the sound and vibration indicating the end of measurement is not played. If you set the sound OFF but leave the vibration ON, the phone will lightly vibrate indicating the measurement has ended.

  • In the application settings.

    Open Profile from the top right corner of the activity screen in CardioSignal application -> Scroll down to Language under Settings.

  • Open 'Profile' from the top right corner of the Activity screen

    The user account is visible at the top of the screen.

  • The application is a class IIb medical device for detecting signs of atrial fibrillation, supported by a long history of academic research and clinical studies. You can find more information on CardioSignal

  • The health survey helps to assess atrial fibrillation related stroke risk. By answering the health survey, we can provide you with a more personalized experience and help you make informed decisions for your health. Answering the Health survey is voluntary. Choosing not to answer won’t affect the use of CardioSignal.

  • You can access the Quick guide by tapping the Instructions button below the Start button. CardioSignal® Instructions for Use can be read in full by selecting Instructions on the Quick guide.

  • The Terms of Use can be found on our website and in the app under Profile.

    Privacy Policy can be found from our website.

  • You can unsubscribe from email communication at the end of every email.

  • No, CardioSignal is not currently compatible with Apple Health kit.

    1. Close the application and open it again

    2. Make sure you are connected to the internet

    3. Check if the app needs to be updated

    4. Turn your phone off and on again

    If the problem persists, please contact support@cardiosignal.com for further support.

  • After reinstalling CardioSignal, you need to sign into the application again. If you have an active subscription, restoring the subscription is needed:

    Tap the ‘Start’-button → Select ‘Restore Purchase’’ → The subscription is restored, and you can continue taking measurements.

  • The ‘Restore Purchase’ feature checks the status of your CardioSignal subscription. If the subscription is valid, the subscription is restored, and you can continue taking measurements. Restoring subscription may be needed after re-installing the application and sometimes after a re-login.

  • In order for the restore subscription to be successful, you must be signed in on your phone with the Apple ID or Google account with which you have purchased the subscription. Check the status of your subscription in your phone settings. If you need help, contact support@cardiosignal.com

App problems

Technology & privacy

  • Modern smartphones include built-in and sensitive motion sensors (gyroscope and accelerometer). Gyrocardiography harnesses these sensors to measure heart motion. This technology is patented and rigorously validated in several clinical studies. In clinical studies, it is found to have 95.3% sensitivity (the ability to detect atrial fibrillation) and 96.0% specificity (the ability to detect if you don’t have atrial fibrillation). Our team continues to focus on scientific research and collaborates with several universities and hospitals on clinical studies and trials for other heart disease applications.

  • We classify the measurement results (whether signs of atrial fibrillation are detected or not) as health information. We need your consent for processing this data in order to provide you with our service.

  • No, this information is not required to use CardioSignal and we do not collect this information.

  • CardioSignal sends the measurement data to a secure cloud service, where the data is encrypted and stored in our database. CardioSignal may save data, such as measurement history, in the cache of the application. This data is needed, for example, to speed up the startup of the application. You can read more about privacy and data in our Privacy Policy.

  • We have several safeguards in place to ensure that the information you provide us remains safe.

    • We are ISO 27001 certified for information security.

    • We implement rigorous processes and procedures in our organization, such as training, and regular evaluation and assessment of measures taken.

    • We regularly conduct third-party security audits.

    • All data sent to a secure cloud service are transferred via an encrypted connection, and all our databases are encrypted. Databases are encrypted using modern security algorithms.

    • Our databases and servers are located in our partners’ high-availability data centers, and our partners have certified facilities against several standards, e.g. ISO/IEC 27001, ISO 9001, CSA STAR CCM.

    • We use modern password encryption algorithms in our application and servers.

Discontinuing CardioSignal

  • You can cancel your CardioSignal application subscription at any time in your phone settings. This works slightly differently in iPhone and Android phones.

    You can easily access CardioSignal subscription management directly from the application as follows:

    • Open ‘Profile’ from the top right corner of the Activity screen → Manage subscriptions

    • You are then directed to your phone’s subscription management

    • To cancel the CardioSignal-subscription → Tap ‘Cancel subscription’

    or

    iPhone: You can terminate your subscription in the Settings menu. Open Settings -> iTunes and App Store -> click on Apple ID -> View Apple ID -> Subscriptions -> CardioSignal -> Cancel subscription.

    Android: You can terminate your subscription in the Google Play application. Open Google Play -> Open menu (found in the upper right corner) -> Choose subscriptions -> CardioSignal -> Cancel subscription.

    Please note that cancelling your paid subscription does not automatically delete your user account which contains your measurement data, see ‘How do I delete CardioSignal?’

  • Nothing - you can still access your measurement history on your user account after the subscription has been cancelled. You can also share your results if needed after cancellation. However, to re-active the measurement function, a subscription must be purchased.

  • Because our payment and subscription system work through the AppStore and Google Play, we are, unfortunately, unable to refund the price of the application directly to you.

    Therefore, you will need to contact Google Play and the AppStore to request a refund. See here for more information on applying for a refund

    o iPhone: https://support.apple.com/en-gb/HT204084

    o Android: https://support.google.com/googleplay/answer/2479637?hl=en

    Please contact support@cardiosignal.com if you need more information.

  • You can permanently delete your user account from the application settings:

    Log in to CardioSignal → Open ‘Profile’ from the top right corner of the activity screen→ Scroll to the end of the screen → Tap ‘Delete Account’.

    After this, you can delete the application from your phone. If you are unable to delete the account in the application, please contact support@cardiosignal.com for account removal request.

    Please note that account deletion does not automatically cancel your paid subscription – cancellation needs to be done separately in your phone settings, see ’How can I cancel my subscription?’

  • Your user account (email address) will be deleted from our database. Your measurement results, sensor data and possible health survey answers will remain in our database anonymized. Anonymized data means that we cannot identify you anymore, and the data that we have in our database cannot be linked to you in any way. We use anonymized measurement data only to improve our service and for research purposes as stated in our Privacy Policy.