Scale Ruler is the simple application to display the scale of various measurement units. ※ Warning: The accuracy of the scales cannot be guaranteed. Please be sure the calibration. How to use: There are two modes. - Select mode: In UNLOCKED state, after choosing measurement unit, magnification ratio and reduced scale, the scale is displayed. You can lock the scale on the ruler with a switch. - Free mode: In UNLOCKED state, and freely set the scale by dragging the screen to t