Apple Watch Safety Features:

How it works: Using a combination of sensors (accelerometer, gyroscope, and barometer) and advanced algorithms, the Apple Watch can detect if you've been in a severe car crash.
What happens: If a crash is detected, the watch will automatically alert emergency services and send your location to them. It will also notify your emergency contacts. You can dismiss or cancel the alert if you're okay, but if you don't respond within 10 seconds, the alert is sent.

How it works: Fall detection uses the watch's accelerometer and gyroscope to detect hard falls or sudden changes in movement (such as when a person collapses or trips).
What happens: If a fall is detected, the watch will vibrate and sound an alarm. You’ll have the option to dismiss the alert if you’re fine, but if you don’t respond, the watch will automatically call emergency services and share your location with them.

How it works: If you're in an emergency situation, you can press and hold the side button of the Apple Watch to initiate an SOS call.
What happens: The watch will contact emergency services and share your location. It also sends an alert to your emergency contacts with your location details.

How it works: The Apple Watch continuously monitors your heart rate, and if it detects an irregular rhythm (such as atrial fibrillation or a low or high heart rate), it sends you an alert.
What happens: The device can help identify potentially serious heart conditions early, prompting you to seek medical advice or treatment.

How it works: The Apple Watch can take an ECG to assess your heart's electrical activity. This feature is especially useful in detecting irregular heart rhythms, such as atrial fibrillation (AFib).
What happens: The watch records an ECG in just 30 seconds and provides a report that can be shared with your doctor.

How it works: The Apple Watch has a built-in microphone that measures environmental sound levels.
What happens: If the noise level is loud enough to potentially damage your hearing over time, the watch will notify you and recommend you take precautions, such as wearing ear protection.

How it works: The Apple Watch Series 6 and newer models include a sensor to measure the oxygen saturation in your blood.
What happens: Low blood oxygen levels can be a sign of a medical emergency, and the watch will notify you if it detects levels outside the normal range.

How it works: The Apple Watch can dial emergency services in nearly any country, regardless of where it was purchased or activated, as long as you have a cellular connection or Wi-Fi calling enabled.
What happens: This feature is especially useful when traveling internationally, allowing you to quickly access emergency services.

How it works: The Apple Watch tracks your sleep patterns and alerts you to any potential disturbances.
What happens: It helps detect signs of sleep apnea or other irregularities, allowing you to monitor your sleep health more closely.

How it works: The Apple Watch is designed to be water-resistant (up to 50 meters for most models).
What happens: You can use the watch while swimming, and it will track your swim activity, as well as warn you if water enters the speaker system, triggering a water-eject feature.

How it works: If you lose your watch or it’s stolen, the "Find My" feature can help you locate it by pinging its location via GPS.
What happens: You can also remotely lock or erase the device to protect your data.

How it works: The Apple Watch Ultra includes specific safety features for athletes, particularly cyclists. For example, it can detect the force of a fall, track cycling routes, and even offer crash detection tailored for biking incidents.