When you make your sheet, download it and put it in the "Sky Studio" music app (this one) and save it as "ABC123" or something like that, it's a text format. Copy that text and put that into the "Sky music studio" app and done! :D
It'll always say that it couldn't understand the "." But ignore it, it doesn't affect the system at all.
Hope i helped, I'll be up if you have any questions! :)
If you can't find a song you want, you can download a Sky studio app and write your own script. I would recommend Sky Studio by NaTure77. You can write your songs then export it as an ABC.txt file, then copy and paste the notes into this app. I also did this for a song, Your Reality, that I wanted.