STF Kronos app is the companion app specially designed for the STF Kronos Activity Tracker and the STF Kronos SW1813H,SB1003HZ,SB1730HZ, SB1357H,SB1330H,SW1314HN,SB1258H Sport Watch. Developed to work with our smartwatches to help you monitor your activity throughout the day & achieve your goals. non-medical use, only for general fitness/wellness purpose STF Kronos watches offer a selection of fantastic features: The stepometer tracks your steps, distance and calories burned. Sleep monit