Smart Distance is a tool in extended set of the Smart Tools collection. This rangefinder (telemeter) measures the distance to a target using camera perspective. The effective distance is 10m-1km, that is enough for golfers, hunters and sailors. To measure the distance, you should know the height (width) of a target. Don't worry! Man's height is 1.7m(5.6ft), a golf flag is 7ft, a bus is 3.2m(10.5ft), a door is 2.1m(7ft). We can guess approximate height of almost everything. Furthermore, if you know an aircraft model, you can measure the altitude. For reference, Boeing 747's width is 72 meters (236ft). Usage is simple: Enter the height (width) of the target, and touch the screen. When the target is aligned by 2 green lines, get the measured distance. * Pro version added features: - No ads - Camera Zoom - Speed Gun * 3 tools for distance were completed. 1) Smart Ruler (short, touch) : 1-50cm 2) Smart Measure (medium, trigonometry) : 1-50m 3) Smart Distance (long, perspective) : 10m-1km * Do you want ad-free version? download [Smart Distance Pro]. For more information, watch YouTube and visit the blog. Thank you.