Tempo - A Stylish Wireless Temperature Monitor and Data Logger for iOS and Android (Black) Stylish Bluetooth Smart Thermometer and Data Logger designed as a piece of art to be kept on a desk, bookshelf, side board or coffee table. Compatible with iOS and Android smartphones and tablets. Wireless, portable and convenient - no wifi set-up required. Just turn it on, download the free apps and you are away. The current, recent high and recent low temperatures are continually monitored, transmitted and data logged every 1 hour by default (users can change the data logging frequency). Tempo can store 7 days of timestamped hourly temperature data. Range is typically 50 meters (150 feet) line of sight reducing indoors between rooms or where there are significant obstructions between the user and Tempo. The iOS and Android apps allow users to graph historical data, get key statistics on temperature for any period, download data in .csv format via email and display a graphical plot of temperature in real time.