An easy to use application on figuring out which permission to use in Unix/Linux

This app makes it quick and easy to figure out what permission to use when setting or manipulating permissions in Unix/Linux. Most of us know its a simple calculation (Read = 4 Write = 2 Execute = 1) but I personally prefer a visual representation of what I'm setting.

Features:
Octal output
Output of ls -l (rwxr-xr-x)
chmod example
Material design