A free program for Android, by Searles.
Fractview is a free app that lets you view and zoom into the most interesting parts of a two-dimensional fractal. This app is a re-implementation of the original Fractview, which is an open-source application. It has been designed to be as intuitive as possible. If you want to learn more about how it works, take a look at the documentation.
How does it work?
It is very intuitive to use the app. The idea is that you can zoom into the picture using two fingers and move the point around by dragging the finger. You can zoom in and out by moving the point in the direction you want to go. The app also supports several gestures, including pinch-to-zoom and two-finger pinch-to-zoom.
The app has an intuitive editor for color palettes. It is possible to select different colors and create new ones. It is also possible to edit the colors of the existing ones.