When paired with your iPhone, you can make calls and send texts directly from your wrist, navigate your surroundings with Maps, buy items with Apple Pay, and use your voice to interact with Siri. Made to last in almost any kind of weather, the Apple Watch Series 6 is water-resistant up to 164.32GB of built-in storage for apps, watch faces, music, and more. Blood Oxygen sensors and apps have the ability to measure the amount of oxygen in your blood and how well your body absorbs it, which can be essential indicators of potential respiratory conditions. The pulse oximetry SpO2 readings can be made on-demand, taking only 15 seconds, as well as in the background, even at night while you sleep. ECG Combining electrodes inside the digital crown and a back crystal, the Apple. This measurement can possibly help identify medical conditions, and you will be notified if the watch detects a low or high heart rate, as well as an irregular rhythm. The Sleep app works with the Apple Watch to track sleep trends, providing you with data and metrics to allow you to get a better night's rest.