Sites and apps similar to MapMartini include The True Size, which is free. Other options are Comparea.
It is hard to represent our spherical world on flat piece of paper. Cartographers use something called a "projection" to morph the globe into 2D map. The most popular of these is the Mercator projection.
Comparea provides an accurate way to compare the area of two geographic locations. It uses a projection that helps minimize distortion so you can get a better idea of how big areas like Australia and Alaska really are in comparison to others like the United States and Brazil.
