A free program for Android, by Ksd2080.

What is Lotnik Expres?

Lotnik Expres is a simulation platform that lets you fly an aircraft over a 3D environment. It is designed to be used as a tool to help you get a feel for what it is like to fly a real aircraft. It is not designed to be used as a substitute for flying a real aircraft.

The simulators on this platform are all created using the same technology, and have the same airfoil and physics. This makes it possible to compare different simulators, and to see how they differ. It also makes it possible to do a lot of new things, such as fly in different weather conditions, and fly at different times of day.