Picture Grid allows you to project virtual grids into the camera view. The main grid remains horizontal regardless of the motion of the camera. In addition, the location and orientation of the grid, as well as the scale, can be changed. The grid can be used to make measurements in real-time, or from a photograph taken with the application. Two copies of the image are saved, one with, and one without the grids.

Picture Grid has many applications in science, engineering and architecture. It can be used to measure accident and crime scenes in forensics and law enforcement. Any time you want to measure the size and location of objects in your camera's view, Picture Grid can help.

Routines to calibrate the iPhones accelerometer and the camera's field-of-view are included.

A way to keep the iPhone steady and in a fixed position is very helpful, such as an iPhone tripod adapter .