The Navis Windy Smartphone B/S anemometer consists of speed sensors that wirelessly transmit real-time air and temperature data to a smartphone or tablet. With free apps, you can instantly read current, average, and maximum wind speed data, temperature, and view historical graphs. The Windy can store data in the local folder or send it to the cloud, allowing it to be used as a wind recorder. The sensor can operate with multiple smartphones simultaneously.