Smart Measure is a tool that is part of the Smart Tools collection. This rangefinder uses trigonometry to measure the distance and height of a target. To use it, simply stand up and press the shutter while aiming your camera at the ground, not the object. After measuring the distance, you can also measure your friend's height. If the measurement is not accurate, you can calibrate the app using the calibration menu.

The main features of Smart Measure include the ability to switch between meters and feet, a virtual horizon, screen capture, and the option to turn sound effects on or off. The pro version of the app includes additional features such as no ads, the ability to measure width and area, and camera zoom.

Smart Measure is one of three distance measuring tools in the Smart Tools collection. The other two tools are Smart Ruler, which measures distances from 1-50cm, and Smart Distance, which measures distances from 10m-1km using perspective. If you want more tools, you can download the Smart Measure Pro and Smart Tools package. For more information, you can watch YouTube videos or visit the app's blog.

Overall, Smart Measure is a useful tool for measuring distances and heights using your smartphone's camera. Its simple interface and range of features make it a popular choice among users.