The app allows you to set how often you would like the thermometer to report temperature and to set notifications. Say you would like the water to heat up to 38°C. Simply set this temperature on the app and it will notify you when the water heats up. This feature is also very useful during the colder months. If you are worried that water left in the hot tub may freeze overnight, set the temperature to 0°C and you will be notified if it cools down to this temperature and water need to be emptied. Requires no Wifi or 4G connection! How’s that for smart technology? Sit back, relax and let the Bluetooth thermometer work its magic.