X-Watch 4 app is the companion app specially designed for the X-Watch 4 SW1304H Sport Watch. Without compromising your style, our sport smartwatch is not only a traditional smartwatch but a powerful sport computer to monitor your performance in real time, and also let you receive/Reply text message and notifications from your smartphone. A built-in pedometer tracks your steps, distance, and calories burned. SMS/Call: Our smart watch can accept and reply to SMS/Call via App. A built-i