A free program for Android, by DescargaSuperApps.

Dinosaurs Wallpapers is a collection of HD images of various types of dinosaurs. It is designed for use as wallpapers and backgrounds on mobile devices, but it can also be used as a screen saver or lock screen. The images are optimized for use on mobile devices, but they will also work on desktop computers.

You will find a variety of images, including those of Tyrannosaurus Rex, Triceratops, Spinosaurus, Pteranodon, Iguanodon, Camarasaurus, Velociraptor, and many more. The collection is organized by family and species.

Dinosaurs Wallpapers is a free app, and you will not need to pay to download it.