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 the left or right. The setting range is from 1: 1 to 1: 100. When you press and hold the scale value, the keyboard is displayed and you can enter the scale. You can lock the scale on the ruler with a switch. ※Sorry for the advertisement during unlocking. - Calibration As scale is displayed correctly, ruler, using the size of a credit card, please do the calibration. (Please use a ruler as much as possible.) After calibration, please tap the "calibration" button. Calibration results are saved. "Reset" button : the display of the scale to the initial state. Save is not. "Cancel" button : without saving the calibration results, and exit the calibration. Specification of Scale Ruler - measure length meter,inches - magnification ratio 50% , 70.7% , 100% , 141% , 200% - reduced scale 　for meter　 　　1:100 , 1:150 , 1:200 , 1:250 , 1:300 , 1:400 , 1:500 , 1:600 　for inch 　　1:1 , 1:1.5 , 1:2 , 1:2.5 , 1:3 , 1:4 , 1:5 , 1:6 　for inch(Architectural) 　　1:1 , 1:2 , 1:4 , 1:8 , 1:12 , 1:16 , 1:24 , 1:32 , 1:48 , 1:64 　　1:96 , 1:128 , 1:192 , 1:384 　for inch(Engineering) 1:120 , 1:240 , 1:360 , 1:480 , 1:600 , 1:720 1:800 , 1:960 , 1:1080