Grid Drawing app for iPhone and iPad

Grid drawing uses grids as a way to make a drawing from a photo or other image, to help achieve appropriate proportions.
And grid drawing is an inexpensive, low-tech way to reproduce and/or enlarge an image that you want to paint or draw. The grid method can be a fairly time-intensive process, depending on how large and detailed your painting will be. While the process is not as quick as using a projector or transfer paper, it does have the added benefit of helping to improve your drawing and observational skills.

Features:
1. Any size of grid lines.
2. You can zoom in and capture details with your iPhone or iPad.
3. Change the picture to black&white for more easier sketch.
4. You can print the grid with or without the original picture.