Salutations EKG, thank you for asking us your question about the Samsung Galaxy Watch FE. On the advertised Galaxy Watch FE, taking an ECG (EKG) is not automatic and still requires you to place your index finger on the top side button for 30 seconds. While the watch can detect irregular rhythms automatically, a formal, on-demand ECG measurement requires manual activation and skin contact with the button. Hope that helps! If you have additional questions or if you would like further assistance, please let us know by reaching out to Support at your leisure. Thank you for being a loyal Samsung customer. - Debra