Don't you have a pen or a piece of paper in your hand?
This app is made for you!

All you have to do is run the application and start drawing. You don't have to choose any colors, resolutions, change settings.
If you want to save a quick drawing, all you have to do is take a screenshot and the image from your phone will appear in your camera's memory.

A quick game of tic-tac-toe? FastDraw makes it possible for you.
You are in a group of friends and you want to quickly draw your situation at the intersection to get to know the opinions of who should go first?
FastDraw makes it possible for you.

I'd love to hear your opinions on what else a virtual piece of paper and a pen are useful for.
You can also write whether the application should be expanded with a function, e.g. a quick screen, changing colors, or the simplest version of the application - which you are currently using is sufficient. After all, when writing on a piece of paper, we cannot change the color of the paper, the color of the pen, the line width, etc.