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 anywhere. It combines two important ruler measuring modes in one app, which is 2-Lines Ruler and 4-Lines Ruler. You can also switch the ruler's length unit between millimeter and inch by a click.
KEY FEATURES:
★ 2 Ruler modes: 2-Line Ruler and 4-Lines Ruler
★ Object area calculation (All ruler modes)
★ Length unit supported: Inch and millimeter
★ Lock/Unlock screen ruler
★ Easy calibration (Only one time)
★ Display length and width result automatically (All ruler modes)
★ Grid lines display
★ Customizable theme, ruler line color, ruler line Width, text color, text size
★ Simple & smart user interface design
★ Keep screen awake