Smart Tools (com.geogreenapps.smarttools) on Google Play
*** 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