A free app for Android, by Leafgreen.

Fighter Jet Wallpapers is a free application that offers high-quality wallpapers for the Android platform. The content of the app is intended for use as an informative background for your smartphone or tablet. 

Fighter jets are a type of aircraft designed to use controlled flight at high speeds. They are used in both military and non-military settings. In military settings, they are used to attack ground targets, while in non-military settings, they are used for recreational purposes. Fighter jets are one of the most advanced types of aircraft, and their development has been the subject of much research and development.