Not very good
Response from developer
Hi MWR, thanks for taking the time to write this. We want to give you an honest answer rather than a generic one. What you describe is unusual for HeartLab. Our detection pipeline is tuned to be more sensitive than specific, which means that in practice it tends to over-flag ectopic activity (couplets, bigeminy, PVCs, PACs) rather than miss it. Users with a known arrhythmia profile usually tell us the opposite of what you experienced. So either the recording had signal quality issues that limited the analysis, or there's a specific case we'd really like to look at. If you're open to it, please send the ECG export to hello@heartlab.it. We'll review it personally with our team, and if the app genuinely missed what you describe we'll treat it as a priority case. A real recording from someone who already knows what's there is far more useful to us than any synthetic test, and it's exactly how we keep improving the PVC and PAC pipeline. Thanks, The HeartLab team
$50 for an AI “invented” app
Response from developer
HeartLab is not an AI gimmick app. It's the work of a team of 13 people, built in collaboration with cardiologists from Italian hospitals who validated every algorithm we use: • Arrhythmia detection (PAC, PVC, AFib, bigeminy, trigeminy) • Full HRV analysis with 12 metrics including SDNN, rMSSD, pNN50, Poincaré • QT and QTc measurement using the Postema tangent method, the clinical standard used in hospitals • Beat Signature analysis and Cardiac Score • Professional PDF reports for your doctor All of it processed on device. Your ECG data never leaves your phone. The optional AI assistant only ever receives anonymized numerical summaries, never raw ECG data. It's one feature, not the product. Premium costs €49.99 a year, less than a single Holter monitor exam. If you've actually tried the app and have specific feedback, write to hello@heartlab.it. We read and reply to every message. Marta, HeartLab Support
Way off, don’t bother
Response from developer
Hi Artemis-4, thanks for taking the time to write this. Feedback from people with a clinical background is something we genuinely care about, even when it's harsh. Just a couple of points worth clarifying. HeartLab is a wellness and screening app, not a diagnostic medical device. We say this clearly inside the app and on our website. The goal is to help people notice patterns and bring useful information to their doctor, not to replace a clinical evaluation. The algorithms are developed by our biomedical engineers and validated together with cardiologists here in Italy and researchers from a few universities we collaborate with. Every study and reference we rely on is public, both on our website and inside our Discord community. Anyone can read the methodology and check the sources. If you have a specific ECG that gave you a reading you believe was wrong, please send it to hello@heartlab.it. We read every email and we use real cases to keep improving the app. A paramedic's perspective on a concrete trace would actually be very useful to us. To be transparent with anyone reading this: in the past weeks we've been receiving a coordinated wave of 1-star reviews coming from beta testers of a competing app, clearly aimed at damaging our reputation rather than discussing the product. We sincerely hope your review isn't part of that pattern, and if it isn't we apologize for even mentioning it. In any case, we're working with Apple to identify and report bad-faith reviews, and we feel users deserve to know this is happening. We take this kind of responsibility seriously, and we're always open to honest scrutiny. We just want readers of this review to have the full picture of what HeartLab is, what it isn't, and the context we're operating in. Thanks again, The HeartLab team
Horrible app and experience
Response from developer
Hi, thanks for the feedback. We have to address this one openly because it touches a topic many of our users have started asking about. HeartLab is not a copy of any other app. Our development timeline, design files and code commits are fully documented and predate several of the features we're now being compared to. We're a small independent team, building this product since long before the comparison you mention even existed in its current form. For full transparency: in recent weeks we've been receiving a coordinated wave of 1-star reviews on different App Store regions, all dismissive, generic, and pointing users toward the same competing app. We sincerely hope your review is genuine, and if it is we apologize for even mentioning this. But the pattern is clear enough that we feel users deserve to know about it. We're working with Apple to review these cases, and we welcome any honest feedback from real users. If you've actually used HeartLab and something specific didn't work for you, please write to hello@heartlab.it and we'll look into it personally. Every clinical study and methodology behind our algorithms is public on our website and on our Discord community, so anyone can verify what we do and how. Thanks, The HeartLab team
Check ECG+
In case Apple is checking, compare element by element on the screenshot, even the grayed out text of Apple Watch device info is in the same position.
I don’t work for anyone but decent enough to call out dishonesty and unfairness
Response from developer
Edit: the "navigator with R letter" is the standard convention for R-peak annotation used in clinical ECG analysis since the 1960s and across medical-grade devices. The position of Apple Watch device metadata is determined by standard iOS layout patterns. These are not proprietary design choices. Thank you for taking the time to share your thoughts. We take feedback seriously, but we want to clarify that HeartLab is an independently developed product built around its own ECG analysis workflow, AI-assisted interpretation, HRV metrics, and report generation features. Our goal is to help users better understand their heart data, not simply to imitate existing apps. Some visual patterns in ECG applications are naturally similar because they all present the same kind of physiological data, but similarity in how information is displayed does not mean the product or analysis engine was copied. The underlying experience, feature set, and analysis approach in HeartLab are designed from the ground up for our users. If you have specific concerns about any feature or screen, we would be glad to review them directly. Constructive feedback is always welcome, but broad claims of copying without evidence are not helpful to users who are trying to evaluate the app fairly.
All good thanks
Response from developer
Thank you so much for your feedback! We're really glad to hear that HeartLab is still working well for you even after collecting over 5,000 ECGs over the past 5 years. Your support means a lot to us and motivates us to keep improving the app.
Completely inaccurate! Junk.
Response from developer
Thank you for your feedback. HeartLab is not intended to replace a cardiologist or a clinical diagnosis. Our algorithms are developed using validated ECG databases that have been reviewed and annotated by cardiologists, and the app is designed to provide automated insights based on single-lead ECG recordings from supported devices. That said, we take feedback like this very seriously and would genuinely like to understand what happened in your specific case. Signal quality, device positioning, and recording conditions can sometimes affect automated analysis, so reviewing the original ECG can help us investigate and improve the system. Please feel free to contact us so we can look into your case together: Email: hello@heartlab.it WhatsApp: +39 379 234 5841 Our goal is not to mislead users. In fact, most features in HeartLab are completely free, and the premium option is priced among the lowest in the market while offering a wide range of advanced analysis features. User feedback helps us continuously improve the app, and we would truly appreciate the opportunity to review your recording and clarify the situation.
Seems accurate
Response from developer
Thank you, Joseph! It means a lot to hear this from someone who's tested the competition thoroughly. Detecting subtle patterns is exactly what HeartLab is built for, the combination of ECG accuracy, symptom journaling, and exercise tracking is intentional, because heart health rarely tells its full story through readings alone. We're continuously improving the analysis engine, so there's more to come. Stay well! 🫀