Smart Measure allows you to calculate the distance, height, width and area of a surface using the camera of your smartphone.
The app is a bit tricky to use for the first time but once you get a hang of it, its quite easy. The height and distance function is selected by default, to measure the width and area the necessary function needs to be selected from the settings menu -this is the only feature that is annoying as you need to change the settings every time to measure the height, width and area.
This may not be a useful to everyone but it sure is a great app.
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