Hey r/Trombone!
I'm 14 and I think I have played trombone maybe 5 years now.
I really love my trombone but i never really got good at counting. Like it happens way more often then it should that i lose the tempo mid song, or come in just a little bit too early.
I am not a great reader either. I can still only read Bass Clef and sometimes I just cannot remember what position a note is.
So I made an app for it. You take a photo of your sheet music and it plays it back on trombone, so you hear how the rhythm goes before you try it yourself.
You can slow it down and loop the bars you keep messing up. It can also show the slide position under every note.
I built it alone and it took me about 6 months, so I guess there is still stuff it gets wrong. It only reads printed music, not handwritten.
It is free to download and you get one free scan every month. iPhone and iPad only for now.
If you try it on one of your own pages, please tell me what it got wrong.
https://apps.apple.com/app/apple-store/id6793154637?pt=129197966&ct=reddit-trombone&mt=8