*** We welcome your suggestions and comments.Please send us email with your problems.So we can help you and possibly update the app version quickly.*** #Measure your life with Smart Tools. You can measure height, length, distance, angle, direction, sound, speed and magnetic field with your smart device. #Key Feature : -Compass -Magantic Field -Sound -LUX Meter -Speed -Maganifier -Mirror -StopWatch -Angle