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Free Android App Measures Diameters

On DiameterA new Android app which measures diameters may be useful to rocketry hobbyists. ON Diameter is a free app which measures the diameter of an object such as a model rocket body tube.

You place the object to be measured anywhere on your Android device’s screen then move three cross points to align with the object’s boundary. The object’s diameter and area will be shown on the screen. You can toggle the units to select inches or millimeters.

On Diameter Screen Shots

The screen shots above show the app being used to measure several items as well as the screens used to calibrate your device for accurate measurements.

The ON Diameter app is available from the Google Play store.

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