For real no zoom limits no move limits fast sketching.
This all will help you visualize your ideas.

One finger to draw two fingers to pan/zoom.

Features:
-Draw on a limitless board
-Save sketch
-Reload Sketch
-Delete sketch
-Pick color
-Erase undo redo.
-Show/hide grid

Very useful to play a paper game with your friends to take a quick visual note or to note an idea.
You can zoom out and zoom in as much as you want. You can sketch at any zoom level.
Also the app has the feature to save/delete/edit sketches.
Current features: draw erase zoom pan color picker undo redo save as sketch for later use save as image reload sketch grid on/off.

This app does not collect any data about you so it only requires for WRITE_EXTERNAL_STORAGE permission for exporting sketch as image.
This app can't be missing from your pocket it's so useful.

We successfully tested zoom level in the range from 8E-18 to 5636.