Smart Measure Pro is the 2nd set of Smart Tools® collection (distance, height, width, area). This range-finder (telemeter) can measure the Distance, Height, Width and Area of a target using trigonometry.
Are you ready to measure? Just stand up and press the shutter. The important point is aiming the camera at the GROUND, NOT the object. (i.e. In order to measure the distance from someone, aim at his shoes.)
If it is inaccurate, please read the instructions in this app or see the checklist diagram in the blog. The sensors on your phone can be changed according to OS version, firmware and battery status. You can calibrate them with the calibrate menu and settings for yourself.