# Heartline Study — Heart health study for age 65+ > Health study on using iPhone and Apple Watch for AFib detection in seniors. (iPhone/iPad app by Johnson & Johnson Health Technology.) - Source: https://appshunter.io/ios/app/heartline-study/id1496449684 (this page in markdown: same URL + `.md`) - Developer: [Johnson & Johnson Health Technology](https://appshunter.io/developer/1496449683) - Category: Health & Fitness - Price: Free - Rating: 4.64/5 from 4,169 App Store ratings · 54 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 74 MB - Languages: English - Released: 2020-02-24 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/heartline-study/id1496449684/reviews.md ## What is Heartline Study? Enrollment for the Heartline Study is now closed. The Heartline Study by Johnson & Johnson, in collaboration with Apple, explores how everyday technology, like the iPhone and Apple Watch, may help with earlier detection of atrial fibrillation (AFib) in people age 65+. For more information about the Heartline study, future study publications and results, please visit ClinicalTrials.gov. ## Key features - Atrial fibrillation detection - Utilizes iPhone and Apple Watch - Focuses on individuals 65+ - Explores early detection methods ## What do users think of Heartline Study? Overall sentiment: positive **Pros** - 🚀 Game changer for heart monitoring - 👍 Motivating and informative - 📊 Valuable health data and insights - 🤖 Seamless integration with Apple Watch - 🎁 Free Apple Watch provided **Cons** - 🔍 Lack of communication and support - 🤖 Compatibility issues with older devices - 🕰️ Intrusive reminders and notifications - 📊 Incomplete data tracking and syncing **Commonly reported bugs** - Pairing issues between app and Apple Watch - Unreliable activity and exercise tracking **Most requested features** - Blood pressure monitoring - Customizable exercise and activity tracking - Ability to access past educational content - Better integration with other health apps ## Recent user reviews (10 of 54) All indexed reviews: https://appshunter.io/ios/app/heartline-study/id1496449684/reviews.md ### 5/5 — Heartline-a game change *2023-08-24* Just got into the study and learning how to use my Series 6 Apple Watch. I found the support from both the Heartline and Apple great as I had several questions. It is, to my surprise, somewhat enjoyable to get a reminder to “breath mindfully “with a clever GIF for timing. The EKG rhythm strip is of high quality and very easy to use. Integration of the various segments of the study is well done. It is minimally intrusive so far and I think a real game changer for patients with a family history of atrial fib or who just have extra heart beats, like myself, and want to monitor it at home. So far, it fills my needs and Seems to be a well designed study. Also, you can withdraw from the study without any penalty. I will write a followup review in about 6-8 weeks. Highly recommended! EKATLER **Developer response:** Hello, thank you for your feedback! We’re so pleased that you’re enjoying the Heartline app and we would love to follow up with you about sharing your review. If you are interested, can you please reach out to Heartline Support at help@heartline.com? ### 3/5 — Heartline *2023-06-15* Overall, I’d like the information provided by the app. However, I missed many points because of the lack of sync between my watch and the phone. I completed almost all the exercises, but particularly near the end of the study, it looks like I didn’t, because I didn’t get credit for hardly any of them. We need a way to be able to access an archive to redo exercises that don’t come through with credit. I’ve been doing this so long I feel a sense of loss that the study is over so I hope you will continue to collect data from us to benefit mankind and to help people with heart conditions. On a separate note, I would like to have a blood pressure app on my Iwatch because that is very important and I am missing it. I would also like to have some kind of thermometer. Thank you for the opportunity to participate in the study. I found the feedback of the Asa portion, extremely valuable, and help me determine sometimes whether to call EMS. My doctor reviewed the data every time I went into the Cardiologist’s office I know he found it helpful, too. **Developer response:** Hi, thank you for your feedback.  We are sorry to learn that you have experienced delays from Heartline Support.  We have been experiencing higher than usual volume and are working with the Heartline Support team to rectify the situation. Your interest in Heartline is very important to us -- please feel free to contact Heartline Support again at help@heartline.com for any assistance. ### 5/5 — My Heartline research study life *2023-04-13* I am so thankful and grateful for being able to participate in this study. It changed my life for the better. It’s been an amazing 2 years that’s quickly gone by. I have learned a great deal about myself. The articles to read are short and concise. The watch part of the study is a tool I hope to have forever. So much joy from it. I have contacted customer support once when my phone needed to be replaced and they are superior people that focus on you!! Great problem solvers they are and so patient for a 70 year old chick. I morphed from my former unstructured self into an improved model by participating in this study. My preset watch has helped me in so many ways it’s difficult for me to put into words. I have tremendous respect for the researchers and their knowledge to help me and others from the data collected from the study. I am sad it’s ending for me, but I will continue working on my own with the framework instilled into me. Many heartfelt thanks to all for this life changing journey!! **Developer response:** Hello, thank you for your feedback! We hope you continue to enjoy your experience. If you have questions at any time, please don't hesitate to contact Heartline Support at help@heartline.com. ### 1/5 — Heartline Study *2023-04-01* Contacted once by a person with the study after months of waiting to find out why my apple watch I’d received could not be paired with my 7S iphone, I signed up and listed to join the study. That one time was the only actual exchange of communication. I was informed I could not use the apple watch as an iphone 8 or higher was needed. Then i received another communication to return the watch. I requested instructions and mailing labels and packaging to do so… THEN I got one other communication to participate in the study without the watch….. I did NOT. I still have the brand new watch btw, and to this day have never received a mail label or packaging to return the watch, nor any other follow up in response or follow-up to the study. This request for the final two days to ‘wrap up’ is the only other communication I’ve received. So discouraged by the poor effort and guidance in communication and misleading/incorrect info for this ‘study’. Very negative experience. ### 5/5 — This app might have saved my life. *2023-02-05, version 1.7.1* Despite being in “perfect health,” I joined the study post-covid in mid-2021 thinking it might be a good idea to have something monitor my heart. After a couple of months I began getting alerts of “rapid heart rate during periods of inactivity.” These became increasingly frequent and I decided I needed to have this checked out. I was due for my annual “wellness check” but with covid still raging and the healthcare system overwhelmed, I might have let it go were it not for these alerts. Long story short, after extensive testing I was diagnosed not with heart problems but with a rare form of blood cancer that was damaging my kidneys. Treatment has been successful and I am now in remission. Had I not been alerted by my watch (which I only obtained because of the study), my outcome might have been very different. ### 5/5 — Heartline *2023-01-30, version 1.7.1* This is a pretty complete and very wordy application that keeps track of your health as related to your heart. It is supposed to see if electronics can detect a fib (atrial fibulation) faster than other means leading to more effective treatment. You are expected to do certain things and receive rewards ($) for their completion. It is a bit time consuming but not terribly intrusive. I plan to stay in the program for the 2 or 3 years it will encompass. Also they got me a $350 discount on an Apple Watch series 7. I have been in the program for about a year, and have learned a great deal about heart health. This is a useful tool and I recommend it. ### 2/5 — Oops! *2023-01-24, version 1.7.1* Just offering caution so that others don't make or fall into the same errorneous mistake as I did. Accurate medical health history in the sign-up process was not able to provided due to the page slipping by before info could be added/subtracted/corrected. Could well have been my mistake, but somehow it happened without my knowledge. There was no way to go back to correct it, even with a phone call to the Help Line. The Help Line Rep was very kind and knowledgeable, and was only able to provide a note to my account if Researchers decide more information is needed. Doubtful in the sea of humanity they're dealing with. It's personally disappointing as I'm a retired healthcare provider who likes to give back to Researchers, and feel this is only contributing bogus information. ### 4/5 — Heartline *2023-01-15, version 1.7.1* At first it seemed very confusing to me but now I feel I am “catching on”. Not sure if there is a way to organize the info and activities being sent out but I’m fine just catching the different items as I come across them. It would be good to know if I have taken the necessary actions and followed your instructions to make my info and data available to you. Feedback. Don’t know if I got into the sleep study in time. Primary problem is checking on additional info/studies in a timely manner. Need to move my Heartline icon for viewing more quickly I guess. ### 5/5 — Smooth function, a bit TMI *2022-12-20, version 1.7.1* The app certainly shows thorough adherence to informed consent, perhaps to a fault. Any question I might have about the study is answered, multiple times in multiple contexts. All the buttons and steps work the way they should to get me through the process. I just joined, ordered my smart watch, etc. No snags so far. Update: I’m glad to be part of this study. Love the watch, responding to its clever motivational elements, and the app side of things works flawlessly, which is saying a lot! Update: some of the information felt condescending. Exercises did not take account of my disability, so many of them were useless to me. ### 5/5 — Your study saved my life *2022-11-21, version 1.7* I’m pretty sure Heartline saved my life. On July 21, 2022, early in the morning, my Apple Watch tapped me on my wrist and told me I was in AFib. It also contacted my family. After consulting with my primary care doctor and a cardiologist, they ran several tests on me including wearing a heart monitor for a month. They found that I do have AFib. My primary care doctor increased my blood pressure medication and now I am under the care of a cardiologist who put me on blood thinner medication. Since three of my grandparents and my father died of strokes there is a good chance that the same thing could happen to me. I wouldn’t have even known that I had a heart problem if it hadn’t been for the your study. My Apple Watch now also keeps track of my AFib History, which is a little scary, but at least now I know that I need to keep an eye on it. Thank you so much for possibly saving my life. ## Frequently asked questions about Heartline Study ### What was the purpose of the Heartline Study app? The Heartline Study app was part of a research initiative by Johnson & Johnson and Apple. Its purpose was to investigate how common technology, such as the iPhone and Apple Watch, could contribute to the earlier identification of atrial fibrillation (AFib) in individuals aged 65 and above. ### Is enrollment still open for the Heartline Study? No, enrollment for the Heartline Study is now closed. The study has concluded its recruitment phase. ### What technology was used in the Heartline Study? The study utilized everyday technology, specifically the iPhone and Apple Watch, to explore their potential in detecting atrial fibrillation (AFib). These devices were used to gather data and monitor heart rhythms. ### Where can I find information about the study's results? For more information regarding the Heartline Study, including future publications and results, you are encouraged to visit ClinicalTrials.gov. This platform provides details on ongoing and completed clinical trials. ## Version history (last 5 releases) ### 1.9.0 — 2024-06-17 This version includes updates to the user experience and bug fixes. ### 1.8.3 — 2024-03-18 This version includes bug fixes. ### 1.8.1 — 2023-12-19 This version includes bug fixes ### 1.8 — 2023-10-26 This version includes updates to the user experience and bug fixes. ### 1.7.2 — 2023-10-11 This version includes bug fixes. ## Apps similar to Heartline Study | App | Rating | Price | Category | | --- | --- | --- | --- | | [Instant Heart Rate+ HR Monitor](https://appshunter.io/ios/app/instant-heart-rate-plus-hr-monitor/id395042892) | 4.9 (31,886) | Free | Health & Fitness | | [Heartify: Heart Health Monitor](https://appshunter.io/ios/app/heartify-heart-health-monitor/id1546156891) | 4.7 (117,841) | Free | Health & Fitness | | [Cardiio: Heart Rate Monitor](https://appshunter.io/ios/app/cardiio-heart-rate-monitor/id542891434) | 4.7 (58,367) | Free | Health & Fitness | | [InPulse - Heart Rate Monitor](https://appshunter.io/ios/app/inpulse-heart-rate-monitor/id1489944782) | 4.6 (166,399) | Free | Health & Fitness | | [Heart Rate Plus: Pulse Monitor](https://appshunter.io/ios/app/heart-rate-plus-pulse-monitor/id1061544495) | 4.5 (3,385) | Free | Health & Fitness | | [Instant Heart Rate: HR Monitor](https://appshunter.io/ios/app/instant-heart-rate-hr-monitor/id409625068) | 4.9 (228,630) | Free | Health & Fitness | --- *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.*