"Mark On Call" Floor Plan Designer for iPhone

One of the most difficult aspects of building a tiny house is selecting a floor plan.  As in any dwelling, there are simply too many objects competing for limited floorspace.  The complexity is greater in a smaller home.  Fortunately there is an application for the iPhone and iPad called Mark On Call that allows you to quickly create and modify home designs on your mobile device.  I used Mark On Call to create more than a dozen drawings before hammering a single nail, and surely saved many hours had I chosen instead to use pencil and paper.  It is perfect for capturing ideas as they come to you, and for making better use idle time.  For example, I enjoy playing around with tiny house layouts at bedtime.  You can set room dimensions, zoom in and out, and click to add, resize, and rotate furniture.  For $4.99, Mark On Call is possibly the best money spent for the tiny house builder.