Raytracer Demo is a native C++ CPU ray tracer available on Android. It is a threaded program that runs at close to real-time on multi-core devices. This program is perfect for those who want to interact with the spheres during the render, something that is not possible with any other ray tracer currently on the Android Play Store. The acceleration structures, interlacing, native implementation, and multi-threading make this a high-speed program. Additionally, it has environment mapping and recursive reflections features that make it even more attractive.

Source code is available on GitHub, and it is a free program with no subcategory. Overall, Raytracer Demo is an excellent program for those who are looking for a fast and interactive CPU ray tracer on their Android device.