Sand in a Box is a falling sand simulation app. Just touch the screen to see how grains of sand fall and form stacks. Just try it and you see how fun it is to form landscapes out of sand or watch the water flow.


Features:
- Sand Physics: Watch how sands falls and interacts with wall and water.
- intuitive controls: touch the screen to "paint" the sand.
- and it's free!

Version 4.0 introduces new simulation algorithm. As some reviewers suggested, they liked older version better, so this new algorithm returns to original simulation from 2011 and makes it even better. Now particles move more freely making simulation more dynamic and there's no more randomization involved in simulation.

Box has no bottom anymore, particles that fall on the bottom will appear on top. If you're thinking with portals you know what I mean. Now you can create endless waterfalls or sandfalls and redirect particles in any way.