Meet the Tilt Digital Wireless Hydrometer & Thermometer: a wireless hydrometer and temperature monitor that pairs with your iOS and Android device to give you readings. It lets you post data to the cloud via Google Sheets. It can measure Specific Gravity between 0.990 to 1.120 SG.
Tilt lasts up to 3 months on battery. It has a data long range of about 25ft.