It has all the same core fitness and sports tracking as the Series 3, including built-in GPS and a swimproof design. You can also expect improvements in run tracking and new supported activities like yoga and hiking. It comes packing LTE once again so you can take it out sans iPhone and still make/receive calls, get texts and all other notifications you would on your phone. A new speaker should also make Siri chats and phone calls sound louder and clearer.
Samsung's Galaxy Watch, a Tizen OS watch (starting at $329), is our favorite smartwatch for Android users. In addition to up to four days of battery life and a great design, the Galaxy Watch offers built-in GPS, heart rate sensor, water-resistance, Samsung Pay support, plus a nifty rotating bezel for navigating the interface. You can also download music from Spotify to the watch for offline listening. However, you get far fewer apps than you would with a Wear OS watch.