Sheet Music Reader/Replacement With MuseScore

My apologies if this has already been addressed…

In my quest to replace binders full of sheet music, I have been searching in vain for a sheet music replacement (reading) program/app that works well on a non-Apple or Apple tablet.

This program/app would offer FULL screen viewing, page turning (through a Bluetooth device like AirTurn), file organization, the ability to make notes or corrections and most importantly (for me), the ability to transpose when necessary.

Alas, the only thing I am aware of out there are the myriad of PDF reading apps that essentially allow you to read, organize and annotate if necessary but of course, not transpose or make an actual change to a score. Unfortunately, mentally transposing on the fly in any key is not a talent I possess so the ability to change the key of my sheet music when necessary would be a HUGE plus. The only way to accomplish that with the PDF readers is to create scores in every key and file them in digital song binders...just in case.

That seems like a waste of time and hardly a good way, which is why I am posting this request:

What can't MuseScore be this elusive program? All it seems to me that would need to be added is:

1. True full screen/one page letter or landscape view of a just the score sheet. (maybe hitting esc gets you back to the normal view?)

2. Compatibility with a Bluetooth page-turning device.

The tablet could do the rest as far as organizing score files while MuseScore would offer the ability to actually make a correction to a score (versus scribbling a note), changing a chord or transposing to a different key when needed, playback, etc. It would be fantastic!

You would also have the ability (via the tablet) to immediately share the corrected/modified score with others as a PDF through the MuseScore export function or even print it out if a printer was handy.

I am the furthest thing from a computer programmer but if these two features could be added to MuseScore, it would be an awesome all-in-one program. I realize that the intent of MuseScore is a notation program, but why can't it be both a notation and a reading program in one if it can?

If it can already be done, please forgive my ignorance and tell me how!