Fitness Tracker Smart Bracelet, Vcall Waterproof Bluetooth Smart Band Wristband Activity Tracker with Sports Pedometer Health Tracker and Sleep Monitor Steps taken at the very beginning will not be DISPLAYED immediately till your steps are getting STEADY. Pair the 2 devices on Zeroner - Sync App Homepage as this would make the pairing work much easier. If you have difficulty registering an account on app Zeroner, please contact us. We will effectively solve the problem Calculate steps, track walking distance, calorie consumption and monitor your sleep quality everyday. Gently remind you by vibration when there are any notifications coming in, you will not miss any important phone calls A standalone fitness tracker. The Bluetooth may disconnect when the 2 devices are out of a given restricted working distance. But do not worry, the bracelet can still track your steps or sleeping respectively, and it will update the data to Zeroner when connected to your phone again Support iPhone 4S/5s/5c/6/6s/6 Plus, iPad3 and IOS7.0 above; Android 4.4 above smart phones. Do a search for Zeroner on Apple Store or Google Play to get the sync app downloaded and installed The I5 S will clean the Data at 00:00 every day and automatic record your next day's sports data. Thought it is waterproof, you still need to clean this bracelet if there are any accidental water & oil contacts