AI-powered platform for high accuracy automatic annotation and interpretation of electrocardiograms, both for long and short ECG records. The manual process of routine ECG interpretation is expensive, time-consuming and requires high qualification. Accessibility of qualified stuff becomes a bottleneck for serving increasing number of patient’s ECGs, coming from personal ECG devices, like Apple Watch 4. CardioAI is online platform, accessible anywhere/anytime from the web browser on wide range of devices, accepts different ECG formats and leads combinations. It replaces ECG technicians for processing the large number of records and reduces processing time to 10 min regardless of the recording time.