RDFit is a connected device companion app that enable sending and receiving of SMS or calls, connects to our smartwatches(device model: IW7 MAX, PS9Ultra2) via Bluetooth,with the user's permission, can push SMS and other app messages to the watch, then view them on the watch, and when an incoming call comes in, it can answer, reject, or reply to SMS on the watch. You can also make calls in the watch address book on the watch to facilitate the user's daily life. RDFit can also detect and evaluate the user's daily activity data, step count, sleep, heart rate, and many other functions. Help you monitor and adjust your daily activities and life. Special statement:non-medical use, only for general fitness/wellness purpose.