More convenient for hulusi scores.
An easy (?) way to type jianpu (numbered musical notation) on your word processor. Not very polished and doesn't have sharps, flats and other embellishments (yet), but gets the job done in a pinch?
Not very intuitive to guess which keys map where (except maybe 0 and 1-7) - look at the key maps.
Even more basic jianpu font. Covers 5 octaves. Has sharps, flats, etc. That's about it.