Since Go is easy to cross compile, this tool can be easily distributed as a binary without any dependencies. You'll find it under Releases here on github. The following platforms are avalible as a ready to run binary file:

OS X (x64)
Linux (x64)
Linux (arm5)
Linux (arm7)
Windows (x64)

https://github.com/dhogborg/rtl-gopow/releases

Performance

A render of a 600 MB csv file takes about 2 minutes on a 2,4 GHz Intel Core i5. There is still lots of room for improvement on that though. Memory usage is quite horrid.

Options

GLOBAL OPTIONS:
   --input, -i      CSV input file generated by rtl_power [required]
   --output, -o     Output file, default same as input file with new extension
   --format, -f 'png'   Output file format, default png [png,jpeg]
   --verbose        Enable more verbose output
   --no-annotations Disabled annotations such as time and frequency scales
   --help, -h       show help
   --version, -v    print the version

Demo

Here is an render of rtl_power tool scanning 80-90 MHz during 2.5 hours moving in a car. .