How to draw a grid over and image that won't be printed?

Question

In high school, I used to print images, draw grids over them and carry them around in my sketch book. Now, I have my smartphone with me all the time and am almost never near a cheap and easy printer. Needless to say, I usually use my phone to find art projects or inspiration images.Is there a software or website that can quickly draw a grid (of my chosen size) over an image on my smartphone that can be saved to my device? It would make my art projects and sketching from a photo a lot easier.

Answer 1

If you prefer analog, you’ll want non-photo blue pencils (often used in animation)

Easily found at most online art supply stores or Amazon.

Answer 2

There is an app you can download from the Google Play Store called "Drawing Grid Maker". It should take care of anything you want as far as laying a grid and there are more options available in the app.

As far as drawing a grid that won't be printed over your personal drawing: There are colored pencils that come in the color "No copy blue". Draw your grid with these. When you copy or print your drawing there will be no sign of the grid or any other marks made with those pencils.