Sim Daltonism is a free iPhone application developed by Michel Fortin. It falls under the category of multimedia and is designed to help users visualize colors as they are perceived by individuals with different types of color blindness.

With Sim Daltonism, users can point their camera at an object or image and see how it would appear to a color blind person. This can be particularly useful for designers looking to create more accessible visual designs, parents trying to understand their child's color choices in drawings, or simply for gaining a better understanding of the world from the perspective of a color blind person.

The application offers simulations for various forms of color blindness, including red-green and blue-yellow deficiencies. It can simulate conditions such as deuteranopia, protanopia, tritanopia, as well as monochromacy and partial monochromacy. However, it is important to note that the colors shown are only an approximation, as color blindness can vary from person to person.

Sim Daltonism is an open source program, providing a valuable tool for better understanding and addressing color blindness.