ScaleRuler is an easy to use scale rule for your iphone. All you need to do is choose inches or metric by tapping the inch/metric button then enter your scale by tapping the set scale button.Drag the blue slider up the ruler until it reaches your desired measurement. Measure your object between the 0 mark and the slider.

- ScaleRuler can Be used to measure objects up to 67.5mm or 2.66".

- ScaleRuler can be used as a normal ruler simply set the scale to 1:1.

- ScaleRuler allows you to enter a scale of any whole number between 1:1 and 1:9999 handy if you need to work to a none standard scale.

-ScaleRuler has a list of the most commonly used inch scales. Use this if you are working in inches and you don't know the scale as a ratio. Your scale might be 1/8" =1' a quick look at the list would tell you that this is a ratio of 1:96 so you simply enter 96 on the set scale screen.

- ScaleRuler allows you to quickly flip between metric and inches on a measurement.

- ScaleRuler displays inches as both a fraction and a decimal number.

- ScaleRuler has a slider lock that prevents accidental movement of slider.

- ScaleRuler saves the state of your application so the next time you open ScaleRuler it will have saved your last measurement.