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ON Protractor

ON Protractor

ON PROTRACTOR turn your smart phone into a useful protractor set for quick angle and slope measurement. It helps you measure the angle of everything conveniently and accurately with your phone anywhere,...

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ON Ruler

ON Ruler

ON RULER is a helpful measuring tool for quick measure of small object's length. It helps you to measure the dimension of objects conveniently and accurately with your phone at anytime and...

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