Despite the multiple apps available, we do provide a free app: Anemotracker. It will allow you to get wind speed and direction from your Ultrasonic Portable Mini and Ultrasonic Portable Solar bluetooth anemometers. You can also save your wind meter data when tracking. It includes 4 different modes : Marine, Golf, Meteo and Ballistics. It will provide you with :Apparent wind speed and direction. Real wind speed and direction (if used on a vehicle or boat). Tracking of your wind data and exportation via excel or Google Earth. Available upgrade to the latest firmware version from the App-This new add-on will let the user to upgrade the Ultrasonic Portable to the latest firmware version from Anemotracker app. Wind direction adjustable damping. Velocity Made Good calculations. New derived data: stylish graphs with Means and deviations. Configuration from the units of measure: m/s, km/h, Kt. Threshold alarm, direction offset, map mode, etc... CM1037: Ultrasonic Portable Mini Hornady Wind Meter User ManualNote: The packaging on this product causes the top of the unit to rub against the inside box lid, resulting in minor cosmetic. This is normal as per the packaging. Calypso Instruments Ultrasonic Portable Mini Original 45m/s Hornady Wind Meter CMI1037