fsheet is a small utility to generate sheet music in PDF for songs
in the amazing flowkey piano learning app,
for offline playing.
Usage:
Log into flowkey in your browser and open a song to generate a PDF for.
Save the page (Ctrl-S) to your local disk, e.g. as flowkey.html.
From the command line, run fsheet path/to/flowkey.html (Linux / macOS) or
fsheet.exe path\to\flowkey.html (Windows), which will generate a pdf in your current directory.