Tracking heart rate is an easy feat for most smartwatches these days, so Apple went ahead and improved it by adding what they call an Optical Heart Rate sensor. Apple says that it’s so accurate that your doctor will work on your heart’s health simply from the capabilities of this watch - even the FDA agrees. That’s basically the first-of-its-kind wrist-hugging ECG which takes readings by completing a circuit when you touch the electrodes built into the Digital Crown and a new electrical heart rate sensor in the back crystal. If you’re not into beating muscles then you can ogle at more screen real-estate now on your wrists as well. The Apple Series 4 watch comes in two sizes: 40mm and 44mm with 30% larger screen in a smaller and thinner frame. The new WatchOS is also packed with improved features and our personal favourite - the Walkie Talkie feature that uses WiFi or cellular connection to communicate between multiple Apple watches. While if you take a serious tumble, the accelerometer and gyroscope can now detect hard falls which sends a notification to the user which can be dismissed or be used to initiate a call to emergency services. After the notification, if Apple Watch senses immobility for 60 seconds, it will automatically call emergency services and send a message along with location to emergency contacts. That’s a trustworthy watch, but we don’t know when it will be coming to India. We’ll update you with the pricing and availability of the Apple Watch Series 4 soon as Apple tells us.