Caliper Pro - precision measuring tool app for iPhone and iPad
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This is a tool which measures of length, diameter, radius.
This is a student to learn the necessary elements of the ruler.
It is called caliper! Caliper interface is not only easy to use, but also the measurement data is very accurate, and its data can be accurate to 0.1 mm, just you install the software on your phone, you can have a portable measurement tool, a portable study tool.
Quickly download and try it!