iRhythm Technologies, Inc. is a digital healthcare company, which engages in the provision of design, development, and commercialization of device-based technology to provide ambulatory cardiac monitoring services. The company is headquartered in San Francisco, California and currently employs 2,000 full-time employees. The company went IPO on 2016-10-20. The firm designs, develops, and commercializes device-based technology to provide ambulatory cardiac monitoring services. The company offers three Zio System options: the Zio Monitor System, the Zio XT System, and the Zio AT System. The company offers its Zio ambulatory cardiac monitoring services, including long-term continuous monitoring, short-term continuous monitoring, and mobile cardiac telemetry (MCT) monitoring services (Zio Services), using its Zio Systems. The Zio Monitor System is a prescription-only, remote ECG monitoring system that consists of a patch ECG monitor (the Zio Monitor patch) that records the electric signal from the heart continuously for up to 14 days and the Zio ECG Utilization Software (ZEUS) System, which supports the capture and analysis of ECG data recorded by the Zio Monitor patch at the end of the wear period.