App to make a map/diagram?

[GIZBUG]

I have 2 storage unit rooms at my condo, and each room has cages from owners. Any recommendations on an app that I can make a map / diagram of those storage bays to post for owners?

 

[onekerato]

Use the shape-drawing tools in Keynote (or PowerPoint) or use a web tool like at lucidchart.com or google drawing.

For your purposes, you can also take a photo and annotate it in an app like Skitch.

 

[Gregg2]

Or just use a ruler and a pen or pencil...