Mandelbrot Explorer is a free Android app developed by Defiant Technologies LLC that allows users to explore the famous fractal known as the Mandelbrot Set. The app offers various features including pan and zoom (with tap and pinch), and the ability to change the number of iterations with the volume up/down buttons. In addition, it also allows users to preview the Julia set corresponding to any point on the Mandelbrot. The app is designed for maximum performance as it uses double precision, multiple threads, and native code.

The app is perfect for those interested in exploring the fascinating world of fractals. With its fast and powerful features, it provides users with an immersive experience of the Mandelbrot Set. The ability to preview the Julia set adds to the app's versatility, making it an excellent tool for both beginners and advanced users. Overall, Mandelbrot Explorer is a great app for anyone looking to explore the beauty and complexity of fractals on their Android device.