Review of Kardia Band Mobile ECG for Apple Watch

The skeptical cardiologist has been evaluating the Kardia Band from AliveCor which allows one to record single lead medical grade ECGS on your Apple Watch. What follows is my initial experience with setting up the device and using it to make recordings.

After ordering my Kardia Band for Apple Watch on 11/30  from AliveCor the device appeared on my door step 2 days later on a Saturday giving me most of a Sunday to evaluate it.

What’s In The Box

Inside the box I found one small and one large black rubber wrist watch band

The larger one had had a small squarish silver metallic sensor and the smaller one had a space to insert a sensor. It turns out my wrist required the smaller band and it was very easy to pop out the sensor and pop it into the smaller band.

After replacing my current band with the Kardia band (requires pushing the button just below the band and sliding the old band out then sliding the new one in) I was ready to go.

The Eternal  fiancée did not complain about the appearance of the band so I’m taking that to mean it passes the sufficiently stylish test. She did inquire as to different colors but it appears AliveCor only has one style and one color to choose from right now.

I have had problems with rashes developing with Apple’s rubbery band and switched to a different one but thus far the Kardia band is not causing wrist irritation.

Set UP

I didn’t encounter any directions in the box or online so I clicked on the Kardia app on the watch and the following distressing message appeared.

Prior to 11/30 Kardia Band only worked in certain countries in Europe so I suspected my AliveCor app needed to be updated.

I redownloaded the Kardia app from the Apple App Store , deleted it off my Watch and reinstalled it.

I was thrilled when the app opened up and gave me the following message

However, I was a little puzzled as I was not aware that setting up Smart Rhythm was a requirement to utilize the ECG recording aspect of Kardia Band. Since I have been granted a grandfathered Premium membership by AliveCor I knew that I would have access to Smart Rhythm and went through the process of entering my name and email into the Kardia app to get this started.

Alas, when the Watch Kardia app was accessed after this I continued to get the same screen. Clicking on “need help” revealed the following message:

Bluetooth was clearly on and several attempts to restart both the watch and the iPhone app did not advance the situation.

I sent out pleas for assistance to AliveCor.

At this point the Eternal Fiancee had awoken and we went to Sardella for a delightful brunch . I had this marvelous item:

Eggs Benedict Raviolo, Mortadella, Bread Ricotta, Egg Yolk, Brown Butter Hollandaise, Potatoes 15.
 Later on that day I returned to my Kardia Band iPhone and deinstalled, reinstalled , reloaded and restarted everything.
The First Recording
At this point it worked and I was able to obtain my first recording by pushing the record ECG button and holding my thumb on the sensor for 30 seconds.
I’ve made lots of recordings since then and they are good quality and have accurately recognized that I am in normal sinus rhythm.
The Smart Rhythm component has also been working. Here is a screen shot of today’s graph.
You’l notice that the Smart Rhythm AI gave me a warning sometime in the morning (which I missed) as it felt my rhythm was abnormal. I missed making the recording but am certain that I was not in afib.
Comparison of the Kardia Band recording (on the right) versus the separate Kardia device recording (on left)  shows that they are very similar in terms of the voltage or height of the p waves, QRS complexes and T waves. 
I felt a palpitation earlier and was able to quickly activate the Kardia Watch app and make a recording which revealed a PVC.
 In summary, after some difficulty getting the app to work I am very pleased with the ease of recording, the quality of the recording and the overall performance of Kardia Band. The difficulties I encountered might reflect an early adoption issue which may already be resolved. Please give me feedback on how the device set up worked for you.
I’ll be testing this out on patients with atrial fibrillation and report on how it works in various situations in future posts.
After more experience with the Smart Rhythm monitoring system which I think could be a fantastic breakthrough in personal health monitoring I’ll give a detailed analysis of that feature.
Everwatchingly Yours,

11 thoughts on “Review of Kardia Band Mobile ECG for Apple Watch”

  1. Excellent review and lunch.

    Assuming money is no object, is the Smart Rhythm feature worth the upgrade from the original Kardia device? Looks neat, and I have the watch already.


    1. Note that you do not need to purchase KardiaBand hardware to use SmartRhythm, it is a premium feature that can be used in conjunction with KardiaMobile OR KardiaBand, as long as you have a compatible Apple Watch.

      Source: Alivecor’s FAQs

      1. Given that Smart Rhythm “is a system that takes your heart rate and activity data gathered from the Apple Watch and evaluates it” it is hard for me
        to understand how it will work without Kardia Band.
        Kardia Mobile is not continuously monitoring your heart rhythm

  2. I just got my KardiaBand for my series 3, non-cellular Apple watch which I use with an iPhone SE. I have not previously used any monitoring device so did not receive any weird messages in setting up. One does need to go to the Watch app on the phone, tap ‘my watch,’ and set the Wake Up (under General) to 70 seconds. My first EKG was successful, and I should get the results of the free evaluation tomorrow. I’m one of those asymptomatic afib patients who has experienced heart failure, so I really hope this device will help me and my cardiologist determine when I’m not in normal sinus rhythm – no heart failure for over 2 years and I’ve been off antiarrthymics since January. Walking over 1900 miles in the past 19 months has probably helped.

    Great blog! My cardiologist got my patient referral to it yesterday.

  3. Thanks for the review. I had a heart attack a couple of years ago and had a stent installed.

    My question, is this something I should get and that would give valuable information or is it better suited for folks with atrial fibrillation?

  4. Thank you for this very informative blog and great review of Kardia Band! You’re my new “heart hero” as I love your practical advice & no-nonsense approach to heart health! I just received my new Kardia Band for my newest Apple Watch 3 Cellular, and as I have been a longtime Kardia Mobile customer I had no trouble installing the Watch app & getting everything configured. As an existing customer it did not re-run the free analysis. I verified that all Kardia Band features continue to work properly when away from my iPhone for extended periods; now that my Apple Watch has cellular I leave my phone home more often. FYI For those like me who enjoy making a fashion statement with their watch and have multiple Apple Sport Bands, I verified that I can use just the portion of the black Kardia Band that contains the Kardia device mixed with the short snap portion of a regular Apple Sport Band; the Apple Band’s snap securely pops into the holes designed for the Kardia Buckle and the end of the Kardia Band tucks into the slot in the Apple Sport Band securely. Fashion can now be combined with improved heart health as I can now wear a sporty two-tone band combo of black & yellow, black & green, etc. just like I used to do. I also personally prefer the ease putting on my watch using the Apple snap instead of the Kardia buckle.

    1. Allen, Thank you for your kinds words.
      I’m glad to hear that you had no trouble installing the Watch app and getting configured.
      I had’nt tested the watch away from iPhone so I’m happy to hear that the Kardia band retains functionality. I assume that means you can make a recording of an ECG and that SmartRhythm continues to monitor things.
      “I verified that I can use just the portion of the black Kardia Band that contains the Kardia device mixed with the short snap portion of a regular Apple Sport Band; the Apple Band’s snap securely pops into the holes designed for the Kardia Buckle and the end of the Kardia Band tucks into the slot in the Apple Sport Band securely.”
      That is cool!
      Thanks for the comments.

  5. Just got my Kardia Band on 12/7 & the set up on my Apple Watch series 3 & iPhone x went smoothly. The free initial evaluation of the ECG/EKG by the AliveCor cardiologist revealed normal sinus rhythm – Yipee! I noticed that the SmartRhythm feature leaves the sensors on the back of the watch lit up green all of the time, even when I take the watch off. I am sure this will deplete the battery at a faster rate. By how much will have to be determined over time. Couldn’t figure out how to turn the green sensors off using the app, so I powered off the watch & then turned the watch on again, which turned the green sensors off. If anyone knows how to accomplish this task, let us know..

    I am a Physician Assistant & I find the use of my watch in this way to be really useful – exciting actually. Sometimes technology is actually a good thing. I look forward to discussing this device with my cardiologist the next time I see him in April. I don’t have afib, but I am at risk (65yo, type 2 diabetes, hypertension, hyperlipidemia), so keeping ahead of the curve gives me some piece of mind.

    I accidently discovered your website today, looking for more reviews of the Kardia Band. Well done Dr. P. !!! I will explore the rest of your site soon.

    1. Craig,
      Glad the set up was smooth. That seems to be the norm now.
      I noticed the eerie greenish glow coming from the back of the watch last night when I put it on my bedside stand. Typically I charge the watch overnight and hadn’t previously noticed that.
      Battery depletion is an issue, it seems mine lasts from about 7 AM to 5 PM with Smart Rhythm running.

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