QardioCore is a wearable ECG free of wires or patches. It collects medical grade ECG readings that can be tracked using a mobile app and shared with a doctor. https://www.getqardio.com/qardiocore-wearable-ecg-ekg-monitor-iphone/
AliveCor
Kardia Mobile, by AliveCor, is a tiny, personal ECG that delivers medical grade results straight to your mobile device. This allows you to know anytime, whether your heart rhythm is normal, or if atrial fibrillation is detected. https://www.alivecor.com/