Need help?

Our most commonly asked questions are answered here

Kardia Stopped Working

If your Kardia Mobile stopped transmitting a signal, or if your signal strength is consistently poor, it may be time for you to replace the battery. Kardia operates on a standard 3V 2016 coin cell battery that can be found at most grocery or drug stores. Remove and replace the battery by carefully opening the compartment on the back of your Kardia, being sure to place the battery face up (so you can read the writing) and ensuring you remove the protective plastic film that covers the battery. If Kardia is still not working after replacing the battery, be sure you are following our guidelines for taking a clean tracing, and that your smart phone or tablet is on our compatibility list.

Basic vs. Premium Subscription

All users of Kardia receive a free 30-day trial of our Premium subscription service upon creating a new account. Upon expiration of the trial period, users have an option to upgrade and continue using the paid Premium service, or revert to a no-cost Basic subscription. To continue using the Premium service, you will be prompted to provide your payment information and set up a monthly subscription. Click here to see a comparison of Basic and Premium.

Unclassified Recordings

Kardia has three FDA-cleared algorithms to detect the following conditions and provide users with an Instant Analysis:

Possible Atrial Fibrillation
This is not a diagnosis, but a possible finding based upon algorithmic analysis of your heart rhythm. We encourage you to contact your personal doctor to share this recording, especially if this is the first time you have received this result.

Normal Sinus Rhythm
If no abnormalities are detected in your EKG, you will receive an Instant Analysis finding of “Normal.” This finding indicates that your heart rate is between 50-100 beats per minute and the shape, timing and duration of each beat is considered normal. There is a wide range of normal variability among different individuals, so the Normal algorithm has been designed to be conservative with what it detects as normal.

If you have been diagnosed with a condition that affects the shape of your EKG (e.g., intraventricular conduction delay, left or right bundle branch block, Wolff-Parkinson-White Syndrome, etc.), experience a large number of premature ventricular or atrial contractions (PVC and PAC), are experiencing an arrhythmia, or took a poor quality recording it is unlikely that you will be notified that your EKG is normal.

It is also important to note that the Normal algorithm looks at the entire 30-second recording before determining if it can be declared to be normal. If you experience a small number of PACs or PVCs in a recording of otherwise normal beats in normal rhythm, the Normal Detector will likely declare this recording to be normal.

There are many reasons why you may receive an Unclassified finding. Two common possibilities may be detection of a heart abnormality or arrhythmia other than Atrial Fibrillation, or a heart rate below 50 or above 100 beats per minute. We strongly encourage you to contact your personal doctor if you have questions or concerns about an EKG recording or Instant Analysis finding.

We do not currently have an algorithm that detects other arrhythmias or abnormalities, but your personal doctor or a medical professional trained to read EKGs may be able to detect and interpret another finding upon review of your EKG. You may also send your EKG out to our Clinician Review service where either a Board Certified Cardiologist or Certified Technician will review and interpret your EKG and send a report back to you with their findings.

To send an EKG out for Clinician Review, open the EKG and tap on the envelope icon. Tap on Clinician Review then choose the service you wish to utilize.

Noisy or Unreadable Recordings

There are a few reasons why you may be getting noisy or unreadable recordings. Since Kardia Mobile communicates with your smart phone via high frequency ultrasound, it is important that you keep the device within a few inches of the microphone and eliminate any sources of electric interference. Here are some of the common things to look for:

  1. Confirm your smart phone or tablet is not plugged in or charging while recording an EKG
  2. Move away from sources of electrical interference such as large computer monitors or television screens
  3. Be sure you don’t have headphones plugged in to your smart phone
  4. If you wear hearing aids, be sure to turn them off
  5. If your fingers are dry, try moistening them a bit to improve conductivity with the electrodes

Smart Phone/Tablet Compatibility

As an FDA-cleared device, Kardia may only be used with smart phones and tablets that have been tested and confirmed compatible. Here’s our compatibility list, which we keep up to date as new smart phones and tablets are tested and confirmed.

Availability By Country

Kardia is currently approved for purchase and use in over 25 countries.

  • Australia
  • Bangladesh
  • Belgium
  • Canada
  • Chile
  • France
  • Germany
  • Hong Kong
  • India
  • Ireland
  • Italy
  • Jamaica
  • Luxembourg
  • Malta
  • New Zealand
  • Norway
  • Pakistan
  • Poland
  • Spain
  • Switzerland
  • The Netherlands
  • Trinidad and Tobago
  • United Kingdom
  • United States

If your country is not listed, Kardia Mobile is not currently available for sale, and you will not be able to download the Kardia app. Click here for a list of resellers in approved countries.

Account Access/Password Reset

We all have to remember a lot of passwords. If you forgot your Kardia password, it’s easy to reset it. From the Kardia app, click on the “Forgot Password” link. We’ll send a link and further instructions to the email address that you used to set up and access Kardia. If you don’t have access to that email address to complete the reset process, contact us at for assistance.

Kardia for iPad

While the Kardia app is compatible with Apple iPads, it is categorized in the App Store as an “iPhone Only” app. Here are the steps for downloading Kardia to your iPad:

  1. Open the App Store on your iPad
  2. Tap in the “Search” field and type “Kardia”
  3. In the upper left corner of the App Store screen, look for the button that says “iPad Only”
  4. Tap the arrow next to “iPad Only” and select the option for “iPhone Only”

You should now see the Kardia app and can download it to your iPad!

Before You Buy Kardia

Will Kardia work on my smartphone or tablet?

Kardia is compatible with many popular smartphones and tablets. Since Kardia Mobile is a medical device regulated by the FDA, rigorous testing must be completed before we can claim compatibility. Click here for a list of our compatible devices. If your smartphone or tablet is not listed, please let us know!

Which Kardia product should I order?

When you order Kardia, you’ll receive the Kardia Mobile device and an attachment plate for your smartphone or tablet. If you have an iPhone 5/5s you have the option to order a snap-on case for your attachment plate.

Do I have to use the attachment plate?

While we recommend that you attach your Kardia Mobile to your device for convenience, it is not required. As long as you are within 12 inches of your smartphone or tablet when using Kardia Mobile to take an EKG recording

Do I need phone service or Wi-Fi to take an EKG recording on my Kardia Mobile?

Once logged in, the Mobile EKG does not require a Wi-Fi or mobile connection to record an EKG and save it to the phone/tablet, however it requires one of these to: sync automatically with the AliveCor server, email, or print directly from the Kardia app. If you do not have a Wi-Fi or mobile connection at the time of the EKG recording, you can email or print the data later when you have such a connection and the sync will happen automatically at that time.

Where should I go to order Kardia Mobile?

Kardia Mobile can be purchased from the AliveCor online store at We are unable to take orders by phone.

What is AliveCor's return policy?

If you decide Kardia Mobile isn’t for you, AliveCor will issue you a full refund on your purchase if you contact us within 30 days of delivery. To request a refund, contact AliveCor Support at or (855) 338-8800. We will issue you an RMA number to include when you ship your device back to us and will process your refund upon receipt of your device.

If your device has stopped working and is still under warranty please contact us for troubleshooting assistance. If we find that your device is in fact defective while within the warranty period we will issue a replacement upon receipt of the faulty device.

Where is Kardia Mobile available?

You can currently purchase Kardia Mobile in the following countries:

  • Australia
  • Bangladesh
  • Belgium
  • Canada
  • Chile
  • France
  • Germany
  • Hong Kong
  • India
  • Ireland
  • Italy
  • Jamaica
  • Luxembourg
  • Malta
  • New Zealand
  • Norway
  • Pakistan
  • Poland
  • Spain
  • Switzerland
  • The Netherlands
  • Trinidad and Tobago
  • United Kingdom
  • United States

Is Kardia Mobile covered by my health insurance?

Kardia Mobile is not currently covered by insurance. However, it is eligible for payment using a Health Savings or Flexible Spending Account.

I have a pacemaker or ICD. Can I still use Kardia Mobile?

Kardia Mobile has not been tested for accuracy with EKG recordings taken from users with pacemakers. We cannot recommend Kardia Mobile for users with pacemakers or ICDs because we cannot guarantee the accuracy of the resulting EKG readings.

Is Kardia available in my language?

You can choose to experience Kardia in any of the following languages:

  • English
  • German
  • Dutch
  • Spanish
  • French
  • Italian

Setting Up your Kardia

Attach Kardia Mobile to your device. (Or don't. We can explain.)

If you’re attaching Kardia Mobile to your smartphone, tablet or device case, direction matters. Make sure the word “Kardia” is is facing upright.

Don’t want to stick Kardia Mobile to your fancy new smartphone, tablet or device case? Not a problem. Kardia works just fine as long as it’s within 12 inches (30 cm) of your smartphone or tablet.

Download the Kardia app and create your account.

Search for Kardia at the App Store or Google Play and download, free. Then, open the app, accept the Terms of Service and Privacy Notice and create your account. Enter the email address and password you would like to use AliveCor account then select whether you are a Medical Professional or an Individual User.

Kardia integrated with Apple Health and Google Fit. To learn more about this feature, please refer to the user manual.

Listen Up

Kardia works with the microphone on your smartphone or tablet, allowing you to record voice memos with each EKG to help your doctor understand your heart health and how you are feeling. So, when you’re prompted during setup to let Kardia access your microphone, say “yes,” ok?

App Store Google Play Store

Record your first EKG

Now here’s the exciting part! As part of your account setup, you’ll be asked to take your first EKG recording. Place two or more fingers (it doesn’t matter which ones) from each hand on the electrodes for 30 seconds. While recording, try to relax your arms and remain as still as possible. If you wear hearing aids, please be sure to turn them off when taking a recording. When you are instructed to rotate your phone, please be sure that the bottom of your phone is by your right hand and the top of the phone by your left hand.

US Only: A US board certified cardiologist will automatically review your first recording for free and provide a medical interpretation of your EKG within 24 hours. Once you receive your report notification email, you can record unlimited EKGs.

Need to make a change?

If you buy a new smartphone, tablet or device case, Kardia can go with you. To detach Kardia from the attachment plate, use your thumbs to slide it toward the open end of the plate. The adhesive is designed for one-time use, but additional attachment plates are available for purchase online at the official AliveCor store.

Want more information?

For detailed instructions on setting up and using all of the great Kardia features, please refer to the Kardia User Manual.


How do I buy/pay for Premium?

To subscribe to Premium, tap the heart icon in the upper right of your Kardia account home screen. Tap “Get Premium” and follow the instructions to enter your credit card information. If you have questions about purchasing Premium in the US, please contact customer support here. If you have questions about purchasing Premium outside the US, please contact international customer support at

How am I charged for Premium?

Once you subscribe to Premium, $9.99 USD, or the local price, will be charged to your credit card on a recurring monthly basis. The date of the charge will be on the day you sign up for Premium. For example, if you sign up on March 31, your charge will recur on the last day of every month. You are billed in advance for the subsequent month’s Premium service. If you cancel before the following month is over, we will not be able to refund that month’s Premium charge.

How do I cancel Premium?

To cancel, click on the menu button on the top right corner of your Kardia app. Click “Manage subscription” and “Cancel subscription” and confirm “Yes” on the following screen.

Can a healthcare insurance company or provider pay for Premium?

At this time, the Premium service does not qualify for healthcare reimbursement. However, you can apply your FSA (Flexible Spending Account), HSA (Health Spending Account) or HRA (Health Reimbursement Arrangement) towards the purchase of Kardia Mobile and the Premium service.

How can I purchase clinician reviews?

As a Basic or Premium member, you may send an EKG recording out for review by a board certified cardiologist or trained cardiac technician for an out-of-pocket fee. A comprehensive review and recommendation by a board certified cardiologist is $19 with a response within 24 hours, and a quick interpretation by a trained cardiac technician is $9 with a response within 1 hour. Clinician reviews are also available by a cardiac electrophysiologist in the UK and cardiologists in Australia.

If I choose not to subscribe to Premium at the end of my 30-day trial, what does Basic provide?

The Basic service allows for users to store their most recent EKG recording with instant analysis. Click here to see a comparison of Basic and Premium. If you have questions about purchasing Premium in the US, please contact customer support here. If you have questions about purchasing Premium outside the US, please contact international customer support at

What happens to my heart health data (recordings, blood pressure, weight, activity) after my free 30-day Premium trial ends?

Your heart health data from your Premium trial, and from anytime your Premium subscription was active, will be visible in your Journal within the Kardia app.

When I upgrade to Premium do I see all my historic recordings?

Historic view of heart health data is viewable for the time period in which a paid Premium subscription is active and for your free trial.

Kardia Pro

I already use Kardia. How do I enter the referral code from my doctor?

From your account home page, tap the heart icon in the upper right. A new screen will appear. At the bottom of the screen, tap “Enter Code” and then proceed to enter your unique referral code, and then tap “Submit”. You’ll be brought to a confirmation page with your physician’s Kardia information and payment structure. From there, tap “Get Connected”. Depending on your physician’s policies, you may be asked to enter further payment information. Once complete, your Kardia app will be automatically connected to your physician’s office.

Do I need to pay for a Premium subscription if I am connected to my doctor through Kardia Pro?

No. By connecting to your doctor through Kardia Pro, you can enjoy the benefits of a Premium subscription.

Kardia + Omron Blood Pressure Monitor Integration

Which Omron Blood Pressure monitors are compatible with Kardia?

To connect Kardia with your Omron Blood Pressure monitor, you must be a Kardia user based in the United States. Connectivity is available for Apple iOS users only.

Ten Omron Blood Pressure monitors have been tested for compatibility with Kardia:

  • BP 786/786N
  • BP 761/761N
  • BP 653
  • BP 654
  • BP 786CANN/786 CAN
  • BP 761CANN/761N CAN

Connectivity is supported for iPhone on iOS 8 or higher. Users may download the iPhone app to their iPad as well.

  • iPhone 5/5s/5c
  • iPhone 6/6s
  • iPhone 6 Plus/6s Plus
  • iPad/iPad Pro

How do I connect my Omron Blood Pressure monitor to Kardia?

  1. Download the most recent version of Kardia from the app store
  2. Launch Kardia on your iPhone
  3. Select the Blood Pressure card from the home screen by swiping left and tapping Record Now
  4. Tap on Pair Your Omron Monitor
  5. Press and hold the Transfer or Clock button on your Omron monitor until you see a flashing “P” or “O”, depending on which Omron device you use
  6. On your Kardia app, tap on Pair Now
  7. If your Omron monitor supports multiple users, select which user to connect

Note that only one monitor may be paired to Kardia at a time.

How do I transfer recordings from my Omron Blood Pressure monitor to Kardia?

After you have paired your monitor to Kardia, you can easily transfer future recordings:

  1. Launch Kardia on your iPhone
  2. Swipe left to the Blood Pressure card and tap Record Now
  3. Tap on Transfer Recordings

What if my Blood Pressure recordings don’t transfer to Kardia?

If you are having trouble transferring recordings from your Omron Blood Pressure monitor to Kardia, try re-pairing your device.

  1. Launch Kardia on your iPhone
  2. Swipe left and tap on the Blood Pressure card
  3. Select Pair a Different BP Monitor
  4. Follow the prompts to pair your monitor
  5. After your monitor has been paired, tap on Transfer Recordings

If you are still having difficulty pairing your Omron device or transferring your blood pressure recordings, you may want to try disconnecting the Omron device altogether then reconnect it following these steps:

  1. From your iPhone or iPad, tap on Settings
  2. From the Settings menu, tap on the Bluetooth option
  3. Tap on the selection for your Omron device
  4. Tap on Forget This Device

After you’ve taken these steps, repeat the steps to pair your Omron device to Kardia addressed in the “How do I connect my Omron Blood Pressure monitor to Kardia” section.

How to I access my Blood Pressure recording history?

To view your blood pressure recording history:

  1. Launch Kardia on your iPhone
  2. Tap on the Journal icon
  3. Select Blood Pressure

Where can I buy an Omron Blood Pressure monitor?

Purchase a compatible Omron Blood Pressure monitor at the Omron Online Store. As a Kardia user you will receive a 10% discount off of your purchase!

Can I connect my Omron Blood Pressure monitor to Kardia on my Android smart phone?

Connectivity between Omron Blood Pressure monitors and Kardia is currently available for iPhone/iOS users only. We intend to expand the scope of our offerings with Omron to include Android devices as we work to bring the integrated app to Google Play. Our goal is to work quickly to make the product as accessible as possible so even more people can begin to better understand their own heart health.

Kardia FAQs

Is Kardia FDA-Cleared?

Yes! Kardia is FDA cleared for individual use and for those weighing at least 10kg (22 lbs). It is also CE marked.

What are the AF, Normal and Interference Detectors?

AliveCor has developed three FDA-cleared detectors or algorithms. These detectors are only appropriate for use on Lead I.

The Normal detector will notify you when no abnormalities are detected by displaying the message “Normal. No abnormalities were detected in your EKG.” This means that your heart rate was between 50-100 beats per minute, there were no or very few abnormal beats, and the shape, timing and duration of each beat is considered normal. Remember that there is a wide range of “normal” variability among different individuals, so the Normal detector has been designed to be conservative. Also, if you have been diagnosed by a physician with a condition that affects the shape of your EKG, are experiencing an arrhythmia or took a poor quality recording, it is unlikely that you will be notified that your EKG is normal.

The Interference detector will notify you when the recording is unreadable by displaying a message that says “Unreadable. There was too much interference in this recording. Try to relax and hold still, rest your arms or move to a quiet location.” Once you’ve made these changes you can go ahead and take another recording. Other best practices to get a high quality recording include:

  • Ensure your smartphone or tablet is not plugged in, charging or syncing during recording.
  • Keep your Kardia electrodes clean using an alcohol-based sanitizer.
  • Apply a water-based lotion to your hands prior to taking an EKG recording if your hands are very dry.
  • Enable the “enhanced filter” on your smart phone or tablet.

The AF detector will notify you to the presence of atrial fibrillation with 97% sensitivity and 98% specificity. If AF is detected, you will see the message “Possible AF Detected.” This result is not a diagnosis, only a possible finding. We recommend sending it AliveCor’s EKG analysis service for review, or sharing it with your doctor or medical professional.

Note that the EKG recording must be 30 seconds in length for the detectors to function.

What does it mean if my EKG is Unclassified?

You may receive a message that says “we could not classify this EKG.” This means that the detectors could not classify your EKG recording as Normal, Unreadable or AF. There could be many reasons why you received this message. You have the option to send your EKG for analysis directly from Kardia, or share it with your doctor or medical professional. If you prefer not to receive this message, you can disable the “Unclassified Message” in the Kardia settings.

What do I do if I am unable to take a recording?

If Kardia is not responding or will not take a recording, you may need to replace the battery. Expose the battery door at the back of Kardia Mobile and remove Kardia Mobile from the plate. Remove the battery door, the replace the used battery with a new 3V coin cell battery matched to your model. Orient the battery with the positive terminal up so you can see the writing. Remove the protective sticker from the battery if applicable.

What is the Clinician Review?

You may send an EKG recording out for review by a board certified cardiologist or trained cardiac technician for an out-of-pocket fee. A comprehensive review and recommendation by a board certified cardiologist is $19 with a response within 24 hours, and a quick interpretation by a trained cardiac technician is $9 with a response within 1 hour.

Still have questions?

Please contact customer support and they will be happy to assist you.

Our US customer support team is available at (855) 338 8800 between the hours of 7:00am to 3:00pm PT, Monday through Friday, and our UK-based customer support team is available at +44 (0) 333 301 0433 between the hours of 8:00am to 10:00pm GMT.

Health Professional FAQs

Is Kardia FDA Cleared/CE Marked?

Yes. Kardia is FDA Cleared and CE Marked. Kardia is intended to record, store and transfer single-channel electrocardiogram (EKG) rhythms. Kardia also displays EKG rhythms and detects the presence of atrial fibrillation and normal sinus rhythm when prescribed or used under the care of a physician. Kardia is intended for use by healthcare professionals, individuals with known or suspected heart conditions and health conscious individuals. The device has not been tested for and is not intended for pediatric use.

Does Kardia replace a 12-Lead EKG?

Kardia is a single-channel EKG device and is not intended to be a replacement for a 12-lead EKG.

Are there any known contraindications for Kardia?

There are no known contraindications for Kardia Mobile, although care should be taken when considering using the device according to the warnings and precautions contained in the user Manual.

Where can I find clinical research to support use of Kardia?

Our library of clinical research is maintained here.

Privacy & Security

Is AliveCor HIPAA (Health Insurance Portability and Accountability Act) compliant? What does that mean?

Yes, AliveCor is HIPAA compliant. We take the privacy and security of your medical information seriously. This means we follow HIPAA and HITECH regulations as set forth by U.S. Health and Human Services that require Administrative, Physical, and Technical controls to be in place. We comply with HIPAA requirements to use industry best standards to protect and secure your Protected Health Information collected through our Kardia app.

What information do you collect?

When you create a new account, AliveCor collects the following required information: name, email, date of birth, sex, smoking status, height, weight. We use this information to ensure that only you have access to this account. Other information we collect when you create a new account are: activity level, medications and medical conditions. This information is good to have as a baseline to understand your current condition. This information is not required to access your account. If you are a Premium subscriber, we may collect other information you may input into Kardia, such as EKG recordings, blood pressure, resting heart rate and activity levels. If you are a connected patient to your physician, all of this information will be seen in your doctor’s Kardia Pro account for identification and to help your doctor manage your treatment.

Do any third party vendors have access to user information?

External contractors and companies that provide necessary services may have access to some of your information. The vendor which handles payment processing, is a good example of this. Such vendors are required by law to protect the information we share with them. They do not have access to any of your Kardia recordings or health history.

If I’m connected to my physician, who’s responsible for protecting my data?

AliveCor protects the information collected through Kardia and your healthcare provider is responsible for protecting your information as a policy of their practice.

What type of security do you use?

Our adherence to HIPAA means that all data on our servers is encrypted when it is at rest or in transit. AliveCor uses industry best practices such as AES 256-bit server side encryption for customer EKG recordings, and transport layer security (TLS 1.2) to establish a secure link with cloud servers and to encrypt data in transit.

Do you sell my data?

AliveCor does not resell any data we receive. AliveCor may use de-identified EKG recordings for future clinical research and feature improvements. All personal information is removed from a user’s EKG and stored on our secure and encrypted servers.

Does AliveCor collect info of users who may be children?

Kardia is not FDA indicated for pediatric use. We do not knowingly collect personal info from children under 13. If we find out that a child under 13 has given us personal info, we will take steps to delete that info. If you believe that a child under the age of 13 has given us personal information, please contact us at

For more information on any of the above, or if you have further questions, please refer to our Privacy Policy.