A free app for Android, by Kreiz-Land Games.

The Water Simulator is a physics-based, water-related game. With its simple and intuitive interface, it is suitable for beginners. The main objective is to simulate different states of water. You can change its density, viscosity, and other physical parameters. With each change, the water will behave differently. You can even have different states in one simulation, such as calm or stormy.

The app provides you with the freedom to create your own ship or raft in the simulation. It is also possible to build a house or other objects in the real-time sandbox. 

You can even have fun with the water by destroying objects with explosives.