Kardia, developed by AliveCor, serves as a companion application for FDA-cleared personal EKG devices including KardiaMobile, KardiaMobile 6L, and KardiaBand. The application positions itself in the digital health market by providing accessible cardiac monitoring outside clinical settings, requiring no traditional electrodes, gels, or wires. Its medical clearance distinguishes it from general wellness applications, offering clinically relevant data for healthcare professionals. The core functionality centers on 30-second EKG recordings that detect common arrhythmias including atrial fibrillation. Users can capture multiple readings throughout the day, with the application automatically categorizing results as Normal, Possible AFib, Unclassified, or other rhythm determinations. The software integrates with compatible hardware to provide lead-I or six-lead EKG configurations depending on the device, with data syncing to a secure cloud platform for historical tracking and trend analysis. Medical sharing capabilities allow direct transmission of reports to healthcare providers through encrypted email or integrated EHR systems. User experience demonstrates thoughtful design with a streamlined interface prioritizing accessibility for older demographics. The recording process involves simple finger placement on device electrodes while maintaining contact with the smartphone. Results display immediately with color-coded interpretations and options for adding contextual notes about symptoms, activity, or medications. The dashboard organizes historical recordings chronologically with filtering capabilities, while automated monthly reports summarize cardiac activity patterns for physician review. User feedback consistently highlights reliability and clinical utility, with multiple reviews referencing specific medical events. DAk 040358 noted on August 5, 2025: 'It gives me a good EKG I can share with my doctor.' CE702 reported on July 31, 2025 that the application provided 'reassurance that my health is improving thus my depression & mental health are improving.' Several users, including Fortenowski (July 30, 2025), mentioned cardiologist endorsement and cost savings compared to frequent clinical visits. The application demonstrates significant strengths in providing accessible medical-grade monitoring with professional data sharing capabilities. Limitations include dependence on proprietary hardware purchases and the necessity of physician interpretation for clinical decision-making. While the algorithm provides automated interpretations, false positives and negatives remain possible, requiring professional validation. Ideal use cases involve monitored cardiac rehabilitation, ongoing arrhythmia management, and preventive screening for high-risk individuals under medical supervision.